move upstream into own package
This commit is contained in:
6543
parent
f35c4d0f66
commit
38426c26db
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@ -0,0 +1,23 @@
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package html
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import (
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"bytes"
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"github.com/valyala/fasthttp"
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"strconv"
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)
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// ReturnErrorPage sets the response status code and writes NotFoundPage to the response body, with "%status" replaced
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// with the provided status code.
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func ReturnErrorPage(ctx *fasthttp.RequestCtx, code int) {
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ctx.Response.SetStatusCode(code)
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ctx.Response.Header.SetContentType("text/html; charset=utf-8")
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message := fasthttp.StatusMessage(code)
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if code == fasthttp.StatusMisdirectedRequest {
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message += " - domain not specified in <code>.domains</code> file"
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}
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if code == fasthttp.StatusFailedDependency {
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message += " - target repo/branch doesn't exist or is private"
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}
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// TODO: use template engine?
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ctx.Response.SetBody(bytes.ReplaceAll(NotFoundPage, []byte("%status"), []byte(strconv.Itoa(code)+" "+message)))
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}
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@ -1,11 +1,14 @@
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package server
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import (
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"github.com/OrlovEvgeny/go-mcache"
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"github.com/valyala/fasthttp"
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"net"
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"strings"
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"time"
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"github.com/OrlovEvgeny/go-mcache"
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"github.com/valyala/fasthttp"
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"codeberg.org/codeberg/pages/server/upstream"
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)
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// DnsLookupCacheTimeout specifies the timeout for the DNS lookup cache.
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@ -84,7 +87,7 @@ func checkCanonicalDomain(targetOwner, targetRepo, targetBranch, actualDomain, m
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req.SetRequestURI(giteaRoot + "/api/v1/repos/" + targetOwner + "/" + targetRepo + "/raw/" + targetBranch + "/.domains" + "?access_token=" + giteaApiToken)
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res := fasthttp.AcquireResponse()
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err := upstreamClient.Do(req, res)
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err := upstream.Client.Do(req, res)
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if err == nil && res.StatusCode() == fasthttp.StatusOK {
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for _, domain := range strings.Split(string(res.Body()), "\n") {
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domain = strings.ToLower(domain)
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@ -2,21 +2,13 @@ package server
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import (
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"bytes"
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"fmt"
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"io"
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"mime"
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"path"
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"strconv"
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"strings"
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"time"
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"github.com/OrlovEvgeny/go-mcache"
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"github.com/rs/zerolog/log"
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"github.com/valyala/fasthttp"
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"github.com/valyala/fastjson"
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"codeberg.org/codeberg/pages/html"
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"codeberg.org/codeberg/pages/server/upstream"
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"codeberg.org/codeberg/pages/server/utils"
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"github.com/rs/zerolog/log"
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"github.com/valyala/fasthttp"
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)
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// Handler handles a single HTTP request to the web server.
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@ -49,7 +41,7 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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// Block blacklisted paths (like ACME challenges)
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for _, blacklistedPath := range blacklistedPaths {
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if bytes.HasPrefix(ctx.Path(), blacklistedPath) {
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returnErrorPage(ctx, fasthttp.StatusForbidden)
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html.ReturnErrorPage(ctx, fasthttp.StatusForbidden)
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return
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}
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}
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@ -74,7 +66,7 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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// Prepare request information to Gitea
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var targetOwner, targetRepo, targetBranch, targetPath string
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var targetOptions = &upstreamOptions{
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var targetOptions = &upstream.Options{
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ForbiddenMimeTypes: map[string]struct{}{},
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TryIndexPages: true,
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}
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@ -87,7 +79,7 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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}
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// Check if the branch exists, otherwise treat it as a file path
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branchTimestampResult := getBranchTimestamp(targetOwner, repo, branch, giteaRoot, giteaApiToken)
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branchTimestampResult := upstream.GetBranchTimestamp(targetOwner, repo, branch, giteaRoot, giteaApiToken)
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if branchTimestampResult == nil {
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// branch doesn't exist
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return false
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@ -96,9 +88,9 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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// Branch exists, use it
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targetRepo = repo
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targetPath = strings.Trim(strings.Join(path, "/"), "/")
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targetBranch = branchTimestampResult.branch
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targetBranch = branchTimestampResult.Branch
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targetOptions.BranchTimestamp = branchTimestampResult.timestamp
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targetOptions.BranchTimestamp = branchTimestampResult.Timestamp
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if canonicalLink != "" {
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// Hide from search machines & add canonical link
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@ -128,8 +120,8 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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}
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// Try to request the file from the Gitea API
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if !upstream(ctx, targetOwner, targetRepo, targetBranch, targetPath, giteaRoot, giteaApiToken, targetOptions) {
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returnErrorPage(ctx, ctx.Response.StatusCode())
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if !upstream.Upstream(ctx, targetOwner, targetRepo, targetBranch, targetPath, giteaRoot, giteaApiToken, targetOptions) {
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html.ReturnErrorPage(ctx, ctx.Response.StatusCode())
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}
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}
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@ -163,7 +155,7 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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return
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}
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log.Debug().Msg("missing branch")
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returnErrorPage(ctx, fasthttp.StatusFailedDependency)
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html.ReturnErrorPage(ctx, fasthttp.StatusFailedDependency)
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return
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} else {
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log.Debug().Msg("raw domain preparations, now trying with default branch")
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@ -206,7 +198,7 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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log.Debug().Msg("tryBranch, now trying upstream")
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tryUpstream()
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} else {
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returnErrorPage(ctx, fasthttp.StatusFailedDependency)
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html.ReturnErrorPage(ctx, fasthttp.StatusFailedDependency)
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}
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return
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}
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@ -219,7 +211,7 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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log.Debug().Msg("tryBranch, now trying upstream")
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tryUpstream()
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} else {
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returnErrorPage(ctx, fasthttp.StatusFailedDependency)
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html.ReturnErrorPage(ctx, fasthttp.StatusFailedDependency)
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}
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return
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}
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@ -244,7 +236,7 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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}
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// Couldn't find a valid repo/branch
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returnErrorPage(ctx, fasthttp.StatusFailedDependency)
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html.ReturnErrorPage(ctx, fasthttp.StatusFailedDependency)
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return
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} else {
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trimmedHostStr := string(trimmedHost)
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@ -252,7 +244,7 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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// Serve pages from external domains
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targetOwner, targetRepo, targetBranch = getTargetFromDNS(trimmedHostStr, string(mainDomainSuffix))
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if targetOwner == "" {
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returnErrorPage(ctx, fasthttp.StatusFailedDependency)
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html.ReturnErrorPage(ctx, fasthttp.StatusFailedDependency)
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return
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}
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@ -269,7 +261,7 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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if tryBranch(targetRepo, targetBranch, pathElements, canonicalLink) {
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canonicalDomain, valid := checkCanonicalDomain(targetOwner, targetRepo, targetBranch, trimmedHostStr, string(mainDomainSuffix), giteaRoot, giteaApiToken)
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if !valid {
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returnErrorPage(ctx, fasthttp.StatusMisdirectedRequest)
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html.ReturnErrorPage(ctx, fasthttp.StatusMisdirectedRequest)
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return
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} else if canonicalDomain != trimmedHostStr {
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// only redirect if the target is also a codeberg page!
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@ -278,7 +270,7 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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ctx.Redirect("https://"+canonicalDomain+string(ctx.RequestURI()), fasthttp.StatusTemporaryRedirect)
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return
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} else {
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returnErrorPage(ctx, fasthttp.StatusFailedDependency)
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html.ReturnErrorPage(ctx, fasthttp.StatusFailedDependency)
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return
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}
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}
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@ -287,268 +279,9 @@ func Handler(mainDomainSuffix, rawDomain []byte, giteaRoot, rawInfoPage, giteaAp
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tryUpstream()
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return
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} else {
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returnErrorPage(ctx, fasthttp.StatusFailedDependency)
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html.ReturnErrorPage(ctx, fasthttp.StatusFailedDependency)
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return
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}
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}
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}
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}
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// returnErrorPage sets the response status code and writes NotFoundPage to the response body, with "%status" replaced
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// with the provided status code.
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func returnErrorPage(ctx *fasthttp.RequestCtx, code int) {
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ctx.Response.SetStatusCode(code)
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ctx.Response.Header.SetContentType("text/html; charset=utf-8")
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message := fasthttp.StatusMessage(code)
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if code == fasthttp.StatusMisdirectedRequest {
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message += " - domain not specified in <code>.domains</code> file"
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}
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if code == fasthttp.StatusFailedDependency {
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message += " - target repo/branch doesn't exist or is private"
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}
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// TODO: use template engine?
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ctx.Response.SetBody(bytes.ReplaceAll(html.NotFoundPage, []byte("%status"), []byte(strconv.Itoa(code)+" "+message)))
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}
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// DefaultBranchCacheTimeout specifies the timeout for the default branch cache. It can be quite long.
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var DefaultBranchCacheTimeout = 15 * time.Minute
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// BranchExistanceCacheTimeout specifies the timeout for the branch timestamp & existance cache. It should be shorter
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// than FileCacheTimeout, as that gets invalidated if the branch timestamp has changed. That way, repo changes will be
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// picked up faster, while still allowing the content to be cached longer if nothing changes.
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var BranchExistanceCacheTimeout = 5 * time.Minute
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// branchTimestampCache stores branch timestamps for faster cache checking
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var branchTimestampCache = mcache.New()
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type branchTimestamp struct {
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branch string
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timestamp time.Time
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}
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// FileCacheTimeout specifies the timeout for the file content cache - you might want to make this quite long, depending
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// on your available memory.
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var FileCacheTimeout = 5 * time.Minute
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// FileCacheSizeLimit limits the maximum file size that will be cached, and is set to 1 MB by default.
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var FileCacheSizeLimit = 1024 * 1024
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// fileResponseCache stores responses from the Gitea server
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// TODO: make this an MRU cache with a size limit
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var fileResponseCache = mcache.New()
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type fileResponse struct {
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exists bool
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mimeType string
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body []byte
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}
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// getBranchTimestamp finds the default branch (if branch is "") and returns the last modification time of the branch
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// (or nil if the branch doesn't exist)
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func getBranchTimestamp(owner, repo, branch, giteaRoot, giteaApiToken string) *branchTimestamp {
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if result, ok := branchTimestampCache.Get(owner + "/" + repo + "/" + branch); ok {
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if result == nil {
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return nil
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}
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return result.(*branchTimestamp)
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}
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result := &branchTimestamp{}
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result.branch = branch
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if branch == "" {
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// Get default branch
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var body = make([]byte, 0)
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// TODO: use header for API key?
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status, body, err := fasthttp.GetTimeout(body, giteaRoot+"/api/v1/repos/"+owner+"/"+repo+"?access_token="+giteaApiToken, 5*time.Second)
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if err != nil || status != 200 {
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_ = branchTimestampCache.Set(owner+"/"+repo+"/"+branch, nil, DefaultBranchCacheTimeout)
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return nil
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}
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result.branch = fastjson.GetString(body, "default_branch")
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}
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var body = make([]byte, 0)
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status, body, err := fasthttp.GetTimeout(body, giteaRoot+"/api/v1/repos/"+owner+"/"+repo+"/branches/"+branch+"?access_token="+giteaApiToken, 5*time.Second)
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if err != nil || status != 200 {
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return nil
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}
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result.timestamp, _ = time.Parse(time.RFC3339, fastjson.GetString(body, "commit", "timestamp"))
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_ = branchTimestampCache.Set(owner+"/"+repo+"/"+branch, result, BranchExistanceCacheTimeout)
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return result
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}
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var upstreamClient = fasthttp.Client{
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ReadTimeout: 10 * time.Second,
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MaxConnDuration: 60 * time.Second,
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MaxConnWaitTimeout: 1000 * time.Millisecond,
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MaxConnsPerHost: 128 * 16, // TODO: adjust bottlenecks for best performance with Gitea!
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}
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// upstreamIndexPages lists pages that may be considered as index pages for directories.
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var upstreamIndexPages = []string{
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"index.html",
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}
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// upstream requests a file from the Gitea API at GiteaRoot and writes it to the request context.
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func upstream(ctx *fasthttp.RequestCtx, targetOwner, targetRepo, targetBranch, targetPath, giteaRoot, giteaApiToken string, options *upstreamOptions) (final bool) {
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log := log.With().Strs("upstream", []string{targetOwner, targetRepo, targetBranch, targetPath}).Logger()
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if options.ForbiddenMimeTypes == nil {
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options.ForbiddenMimeTypes = map[string]struct{}{}
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}
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// Check if the branch exists and when it was modified
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if options.BranchTimestamp == (time.Time{}) {
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branch := getBranchTimestamp(targetOwner, targetRepo, targetBranch, giteaRoot, giteaApiToken)
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if branch == nil {
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returnErrorPage(ctx, fasthttp.StatusFailedDependency)
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return true
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}
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targetBranch = branch.branch
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options.BranchTimestamp = branch.timestamp
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}
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if targetOwner == "" || targetRepo == "" || targetBranch == "" {
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returnErrorPage(ctx, fasthttp.StatusBadRequest)
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return true
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}
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// Check if the browser has a cached version
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if ifModifiedSince, err := time.Parse(time.RFC1123, string(ctx.Request.Header.Peek("If-Modified-Since"))); err == nil {
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if !ifModifiedSince.Before(options.BranchTimestamp) {
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ctx.Response.SetStatusCode(fasthttp.StatusNotModified)
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return true
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}
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}
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log.Debug().Msg("preparations")
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// Make a GET request to the upstream URL
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uri := targetOwner + "/" + targetRepo + "/raw/" + targetBranch + "/" + targetPath
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var req *fasthttp.Request
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var res *fasthttp.Response
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var cachedResponse fileResponse
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var err error
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if cachedValue, ok := fileResponseCache.Get(uri + "?timestamp=" + strconv.FormatInt(options.BranchTimestamp.Unix(), 10)); ok && len(cachedValue.(fileResponse).body) > 0 {
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cachedResponse = cachedValue.(fileResponse)
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} else {
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req = fasthttp.AcquireRequest()
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req.SetRequestURI(giteaRoot + "/api/v1/repos/" + uri + "?access_token=" + giteaApiToken)
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res = fasthttp.AcquireResponse()
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res.SetBodyStream(&strings.Reader{}, -1)
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err = upstreamClient.Do(req, res)
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}
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log.Debug().Msg("acquisition")
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// Handle errors
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if (res == nil && !cachedResponse.exists) || (res != nil && res.StatusCode() == fasthttp.StatusNotFound) {
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if options.TryIndexPages {
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// copy the options struct & try if an index page exists
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optionsForIndexPages := *options
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optionsForIndexPages.TryIndexPages = false
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optionsForIndexPages.AppendTrailingSlash = true
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for _, indexPage := range upstreamIndexPages {
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if upstream(ctx, targetOwner, targetRepo, targetBranch, strings.TrimSuffix(targetPath, "/")+"/"+indexPage, giteaRoot, giteaApiToken, &optionsForIndexPages) {
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_ = fileResponseCache.Set(uri+"?timestamp="+strconv.FormatInt(options.BranchTimestamp.Unix(), 10), fileResponse{
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exists: false,
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}, FileCacheTimeout)
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return true
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}
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}
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// compatibility fix for GitHub Pages (/example → /example.html)
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optionsForIndexPages.AppendTrailingSlash = false
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optionsForIndexPages.RedirectIfExists = string(ctx.Request.URI().Path()) + ".html"
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if upstream(ctx, targetOwner, targetRepo, targetBranch, targetPath+".html", giteaRoot, giteaApiToken, &optionsForIndexPages) {
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_ = fileResponseCache.Set(uri+"?timestamp="+strconv.FormatInt(options.BranchTimestamp.Unix(), 10), fileResponse{
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exists: false,
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}, FileCacheTimeout)
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return true
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}
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}
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ctx.Response.SetStatusCode(fasthttp.StatusNotFound)
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if res != nil {
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// Update cache if the request is fresh
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_ = fileResponseCache.Set(uri+"?timestamp="+strconv.FormatInt(options.BranchTimestamp.Unix(), 10), fileResponse{
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exists: false,
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}, FileCacheTimeout)
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}
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return false
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}
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if res != nil && (err != nil || res.StatusCode() != fasthttp.StatusOK) {
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fmt.Printf("Couldn't fetch contents from \"%s\": %s (status code %d)\n", req.RequestURI(), err, res.StatusCode())
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returnErrorPage(ctx, fasthttp.StatusInternalServerError)
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return true
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}
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// Append trailing slash if missing (for index files), and redirect to fix filenames in general
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// options.AppendTrailingSlash is only true when looking for index pages
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if options.AppendTrailingSlash && !bytes.HasSuffix(ctx.Request.URI().Path(), []byte{'/'}) {
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ctx.Redirect(string(ctx.Request.URI().Path())+"/", fasthttp.StatusTemporaryRedirect)
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return true
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}
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if bytes.HasSuffix(ctx.Request.URI().Path(), []byte("/index.html")) {
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ctx.Redirect(strings.TrimSuffix(string(ctx.Request.URI().Path()), "index.html"), fasthttp.StatusTemporaryRedirect)
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return true
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}
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if options.RedirectIfExists != "" {
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ctx.Redirect(options.RedirectIfExists, fasthttp.StatusTemporaryRedirect)
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return true
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}
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log.Debug().Msg("error handling")
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// Set the MIME type
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mimeType := mime.TypeByExtension(path.Ext(targetPath))
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mimeTypeSplit := strings.SplitN(mimeType, ";", 2)
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if _, ok := options.ForbiddenMimeTypes[mimeTypeSplit[0]]; ok || mimeType == "" {
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if options.DefaultMimeType != "" {
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mimeType = options.DefaultMimeType
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} else {
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mimeType = "application/octet-stream"
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}
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}
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ctx.Response.Header.SetContentType(mimeType)
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// Everything's okay so far
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ctx.Response.SetStatusCode(fasthttp.StatusOK)
|
||||
ctx.Response.Header.SetLastModified(options.BranchTimestamp)
|
||||
|
||||
log.Debug().Msg("response preparations")
|
||||
|
||||
// Write the response body to the original request
|
||||
var cacheBodyWriter bytes.Buffer
|
||||
if res != nil {
|
||||
if res.Header.ContentLength() > FileCacheSizeLimit {
|
||||
err = res.BodyWriteTo(ctx.Response.BodyWriter())
|
||||
} else {
|
||||
// TODO: cache is half-empty if request is cancelled - does the ctx.Err() below do the trick?
|
||||
err = res.BodyWriteTo(io.MultiWriter(ctx.Response.BodyWriter(), &cacheBodyWriter))
|
||||
}
|
||||
} else {
|
||||
_, err = ctx.Write(cachedResponse.body)
|
||||
}
|
||||
if err != nil {
|
||||
fmt.Printf("Couldn't write body for \"%s\": %s\n", req.RequestURI(), err)
|
||||
returnErrorPage(ctx, fasthttp.StatusInternalServerError)
|
||||
return true
|
||||
}
|
||||
log.Debug().Msg("response")
|
||||
|
||||
if res != nil && ctx.Err() == nil {
|
||||
cachedResponse.exists = true
|
||||
cachedResponse.mimeType = mimeType
|
||||
cachedResponse.body = cacheBodyWriter.Bytes()
|
||||
_ = fileResponseCache.Set(uri+"?timestamp="+strconv.FormatInt(options.BranchTimestamp.Unix(), 10), cachedResponse, FileCacheTimeout)
|
||||
}
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
// upstreamOptions provides various options for the upstream request.
|
||||
type upstreamOptions struct {
|
||||
DefaultMimeType string
|
||||
ForbiddenMimeTypes map[string]struct{}
|
||||
TryIndexPages bool
|
||||
AppendTrailingSlash bool
|
||||
RedirectIfExists string
|
||||
BranchTimestamp time.Time
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,10 @@
|
|||
package upstream
|
||||
|
||||
import "github.com/OrlovEvgeny/go-mcache"
|
||||
|
||||
// branchTimestampCache stores branch timestamps for faster cache checking
|
||||
var branchTimestampCache = mcache.New()
|
||||
|
||||
// fileResponseCache stores responses from the Gitea server
|
||||
// TODO: make this an MRU cache with a size limit
|
||||
var fileResponseCache = mcache.New()
|
||||
|
|
@ -0,0 +1,18 @@
|
|||
package upstream
|
||||
|
||||
import "time"
|
||||
|
||||
// DefaultBranchCacheTimeout specifies the timeout for the default branch cache. It can be quite long.
|
||||
var DefaultBranchCacheTimeout = 15 * time.Minute
|
||||
|
||||
// BranchExistanceCacheTimeout specifies the timeout for the branch timestamp & existance cache. It should be shorter
|
||||
// than FileCacheTimeout, as that gets invalidated if the branch timestamp has changed. That way, repo changes will be
|
||||
// picked up faster, while still allowing the content to be cached longer if nothing changes.
|
||||
var BranchExistanceCacheTimeout = 5 * time.Minute
|
||||
|
||||
// FileCacheTimeout specifies the timeout for the file content cache - you might want to make this quite long, depending
|
||||
// on your available memory.
|
||||
var FileCacheTimeout = 5 * time.Minute
|
||||
|
||||
// FileCacheSizeLimit limits the maximum file size that will be cached, and is set to 1 MB by default.
|
||||
var FileCacheSizeLimit = 1024 * 1024
|
||||
|
|
@ -0,0 +1,53 @@
|
|||
package upstream
|
||||
|
||||
import (
|
||||
"time"
|
||||
|
||||
"github.com/valyala/fasthttp"
|
||||
"github.com/valyala/fastjson"
|
||||
)
|
||||
|
||||
type branchTimestamp struct {
|
||||
Branch string
|
||||
Timestamp time.Time
|
||||
}
|
||||
|
||||
// GetBranchTimestamp finds the default branch (if branch is "") and returns the last modification time of the branch
|
||||
// (or nil if the branch doesn't exist)
|
||||
func GetBranchTimestamp(owner, repo, branch, giteaRoot, giteaApiToken string) *branchTimestamp {
|
||||
if result, ok := branchTimestampCache.Get(owner + "/" + repo + "/" + branch); ok {
|
||||
if result == nil {
|
||||
return nil
|
||||
}
|
||||
return result.(*branchTimestamp)
|
||||
}
|
||||
result := &branchTimestamp{}
|
||||
result.Branch = branch
|
||||
if branch == "" {
|
||||
// Get default branch
|
||||
var body = make([]byte, 0)
|
||||
// TODO: use header for API key?
|
||||
status, body, err := fasthttp.GetTimeout(body, giteaRoot+"/api/v1/repos/"+owner+"/"+repo+"?access_token="+giteaApiToken, 5*time.Second)
|
||||
if err != nil || status != 200 {
|
||||
_ = branchTimestampCache.Set(owner+"/"+repo+"/"+branch, nil, DefaultBranchCacheTimeout)
|
||||
return nil
|
||||
}
|
||||
result.Branch = fastjson.GetString(body, "default_branch")
|
||||
}
|
||||
|
||||
var body = make([]byte, 0)
|
||||
status, body, err := fasthttp.GetTimeout(body, giteaRoot+"/api/v1/repos/"+owner+"/"+repo+"/branches/"+branch+"?access_token="+giteaApiToken, 5*time.Second)
|
||||
if err != nil || status != 200 {
|
||||
return nil
|
||||
}
|
||||
|
||||
result.Timestamp, _ = time.Parse(time.RFC3339, fastjson.GetString(body, "commit", "timestamp"))
|
||||
_ = branchTimestampCache.Set(owner+"/"+repo+"/"+branch, result, BranchExistanceCacheTimeout)
|
||||
return result
|
||||
}
|
||||
|
||||
type fileResponse struct {
|
||||
exists bool
|
||||
mimeType string
|
||||
body []byte
|
||||
}
|
||||
|
|
@ -0,0 +1,193 @@
|
|||
package upstream
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"io"
|
||||
"mime"
|
||||
"path"
|
||||
"strconv"
|
||||
"strings"
|
||||
"time"
|
||||
|
||||
"codeberg.org/codeberg/pages/html"
|
||||
|
||||
"github.com/rs/zerolog/log"
|
||||
"github.com/valyala/fasthttp"
|
||||
)
|
||||
|
||||
// upstreamIndexPages lists pages that may be considered as index pages for directories.
|
||||
var upstreamIndexPages = []string{
|
||||
"index.html",
|
||||
}
|
||||
|
||||
// Options provides various options for the upstream request.
|
||||
type Options struct {
|
||||
DefaultMimeType string
|
||||
ForbiddenMimeTypes map[string]struct{}
|
||||
TryIndexPages bool
|
||||
AppendTrailingSlash bool
|
||||
RedirectIfExists string
|
||||
BranchTimestamp time.Time
|
||||
}
|
||||
|
||||
var Client = fasthttp.Client{
|
||||
ReadTimeout: 10 * time.Second,
|
||||
MaxConnDuration: 60 * time.Second,
|
||||
MaxConnWaitTimeout: 1000 * time.Millisecond,
|
||||
MaxConnsPerHost: 128 * 16, // TODO: adjust bottlenecks for best performance with Gitea!
|
||||
}
|
||||
|
||||
// Upstream requests a file from the Gitea API at GiteaRoot and writes it to the request context.
|
||||
func Upstream(ctx *fasthttp.RequestCtx, targetOwner, targetRepo, targetBranch, targetPath, giteaRoot, giteaApiToken string, options *Options) (final bool) {
|
||||
log := log.With().Strs("upstream", []string{targetOwner, targetRepo, targetBranch, targetPath}).Logger()
|
||||
|
||||
if options.ForbiddenMimeTypes == nil {
|
||||
options.ForbiddenMimeTypes = map[string]struct{}{}
|
||||
}
|
||||
|
||||
// Check if the branch exists and when it was modified
|
||||
if options.BranchTimestamp == (time.Time{}) {
|
||||
branch := GetBranchTimestamp(targetOwner, targetRepo, targetBranch, giteaRoot, giteaApiToken)
|
||||
|
||||
if branch == nil {
|
||||
html.ReturnErrorPage(ctx, fasthttp.StatusFailedDependency)
|
||||
return true
|
||||
}
|
||||
targetBranch = branch.Branch
|
||||
options.BranchTimestamp = branch.Timestamp
|
||||
}
|
||||
|
||||
if targetOwner == "" || targetRepo == "" || targetBranch == "" {
|
||||
html.ReturnErrorPage(ctx, fasthttp.StatusBadRequest)
|
||||
return true
|
||||
}
|
||||
|
||||
// Check if the browser has a cached version
|
||||
if ifModifiedSince, err := time.Parse(time.RFC1123, string(ctx.Request.Header.Peek("If-Modified-Since"))); err == nil {
|
||||
if !ifModifiedSince.Before(options.BranchTimestamp) {
|
||||
ctx.Response.SetStatusCode(fasthttp.StatusNotModified)
|
||||
return true
|
||||
}
|
||||
}
|
||||
log.Debug().Msg("preparations")
|
||||
|
||||
// Make a GET request to the upstream URL
|
||||
uri := targetOwner + "/" + targetRepo + "/raw/" + targetBranch + "/" + targetPath
|
||||
var req *fasthttp.Request
|
||||
var res *fasthttp.Response
|
||||
var cachedResponse fileResponse
|
||||
var err error
|
||||
if cachedValue, ok := fileResponseCache.Get(uri + "?timestamp=" + strconv.FormatInt(options.BranchTimestamp.Unix(), 10)); ok && len(cachedValue.(fileResponse).body) > 0 {
|
||||
cachedResponse = cachedValue.(fileResponse)
|
||||
} else {
|
||||
req = fasthttp.AcquireRequest()
|
||||
req.SetRequestURI(giteaRoot + "/api/v1/repos/" + uri + "?access_token=" + giteaApiToken)
|
||||
res = fasthttp.AcquireResponse()
|
||||
res.SetBodyStream(&strings.Reader{}, -1)
|
||||
err = Client.Do(req, res)
|
||||
}
|
||||
log.Debug().Msg("acquisition")
|
||||
|
||||
// Handle errors
|
||||
if (res == nil && !cachedResponse.exists) || (res != nil && res.StatusCode() == fasthttp.StatusNotFound) {
|
||||
if options.TryIndexPages {
|
||||
// copy the options struct & try if an index page exists
|
||||
optionsForIndexPages := *options
|
||||
optionsForIndexPages.TryIndexPages = false
|
||||
optionsForIndexPages.AppendTrailingSlash = true
|
||||
for _, indexPage := range upstreamIndexPages {
|
||||
if Upstream(ctx, targetOwner, targetRepo, targetBranch, strings.TrimSuffix(targetPath, "/")+"/"+indexPage, giteaRoot, giteaApiToken, &optionsForIndexPages) {
|
||||
_ = fileResponseCache.Set(uri+"?timestamp="+strconv.FormatInt(options.BranchTimestamp.Unix(), 10), fileResponse{
|
||||
exists: false,
|
||||
}, FileCacheTimeout)
|
||||
return true
|
||||
}
|
||||
}
|
||||
// compatibility fix for GitHub Pages (/example → /example.html)
|
||||
optionsForIndexPages.AppendTrailingSlash = false
|
||||
optionsForIndexPages.RedirectIfExists = string(ctx.Request.URI().Path()) + ".html"
|
||||
if Upstream(ctx, targetOwner, targetRepo, targetBranch, targetPath+".html", giteaRoot, giteaApiToken, &optionsForIndexPages) {
|
||||
_ = fileResponseCache.Set(uri+"?timestamp="+strconv.FormatInt(options.BranchTimestamp.Unix(), 10), fileResponse{
|
||||
exists: false,
|
||||
}, FileCacheTimeout)
|
||||
return true
|
||||
}
|
||||
}
|
||||
ctx.Response.SetStatusCode(fasthttp.StatusNotFound)
|
||||
if res != nil {
|
||||
// Update cache if the request is fresh
|
||||
_ = fileResponseCache.Set(uri+"?timestamp="+strconv.FormatInt(options.BranchTimestamp.Unix(), 10), fileResponse{
|
||||
exists: false,
|
||||
}, FileCacheTimeout)
|
||||
}
|
||||
return false
|
||||
}
|
||||
if res != nil && (err != nil || res.StatusCode() != fasthttp.StatusOK) {
|
||||
fmt.Printf("Couldn't fetch contents from \"%s\": %s (status code %d)\n", req.RequestURI(), err, res.StatusCode())
|
||||
html.ReturnErrorPage(ctx, fasthttp.StatusInternalServerError)
|
||||
return true
|
||||
}
|
||||
|
||||
// Append trailing slash if missing (for index files), and redirect to fix filenames in general
|
||||
// options.AppendTrailingSlash is only true when looking for index pages
|
||||
if options.AppendTrailingSlash && !bytes.HasSuffix(ctx.Request.URI().Path(), []byte{'/'}) {
|
||||
ctx.Redirect(string(ctx.Request.URI().Path())+"/", fasthttp.StatusTemporaryRedirect)
|
||||
return true
|
||||
}
|
||||
if bytes.HasSuffix(ctx.Request.URI().Path(), []byte("/index.html")) {
|
||||
ctx.Redirect(strings.TrimSuffix(string(ctx.Request.URI().Path()), "index.html"), fasthttp.StatusTemporaryRedirect)
|
||||
return true
|
||||
}
|
||||
if options.RedirectIfExists != "" {
|
||||
ctx.Redirect(options.RedirectIfExists, fasthttp.StatusTemporaryRedirect)
|
||||
return true
|
||||
}
|
||||
log.Debug().Msg("error handling")
|
||||
|
||||
// Set the MIME type
|
||||
mimeType := mime.TypeByExtension(path.Ext(targetPath))
|
||||
mimeTypeSplit := strings.SplitN(mimeType, ";", 2)
|
||||
if _, ok := options.ForbiddenMimeTypes[mimeTypeSplit[0]]; ok || mimeType == "" {
|
||||
if options.DefaultMimeType != "" {
|
||||
mimeType = options.DefaultMimeType
|
||||
} else {
|
||||
mimeType = "application/octet-stream"
|
||||
}
|
||||
}
|
||||
ctx.Response.Header.SetContentType(mimeType)
|
||||
|
||||
// Everything's okay so far
|
||||
ctx.Response.SetStatusCode(fasthttp.StatusOK)
|
||||
ctx.Response.Header.SetLastModified(options.BranchTimestamp)
|
||||
|
||||
log.Debug().Msg("response preparations")
|
||||
|
||||
// Write the response body to the original request
|
||||
var cacheBodyWriter bytes.Buffer
|
||||
if res != nil {
|
||||
if res.Header.ContentLength() > FileCacheSizeLimit {
|
||||
err = res.BodyWriteTo(ctx.Response.BodyWriter())
|
||||
} else {
|
||||
// TODO: cache is half-empty if request is cancelled - does the ctx.Err() below do the trick?
|
||||
err = res.BodyWriteTo(io.MultiWriter(ctx.Response.BodyWriter(), &cacheBodyWriter))
|
||||
}
|
||||
} else {
|
||||
_, err = ctx.Write(cachedResponse.body)
|
||||
}
|
||||
if err != nil {
|
||||
fmt.Printf("Couldn't write body for \"%s\": %s\n", req.RequestURI(), err)
|
||||
html.ReturnErrorPage(ctx, fasthttp.StatusInternalServerError)
|
||||
return true
|
||||
}
|
||||
log.Debug().Msg("response")
|
||||
|
||||
if res != nil && ctx.Err() == nil {
|
||||
cachedResponse.exists = true
|
||||
cachedResponse.mimeType = mimeType
|
||||
cachedResponse.body = cacheBodyWriter.Bytes()
|
||||
_ = fileResponseCache.Set(uri+"?timestamp="+strconv.FormatInt(options.BranchTimestamp.Unix(), 10), cachedResponse, FileCacheTimeout)
|
||||
}
|
||||
|
||||
return true
|
||||
}
|
||||
Loading…
Reference in New Issue