mu/html/092socket.mu.html
Kartik Agaram 08a0eed699 4891
Couple more tweaks to html rendering:
a) SubX definitions no longer link redundantly to themselves. This long-standing
issue turns out to be tractable to solve for SubX files since the syntax
is so simple.
b) Fix links to SubX definitions in other directories. I forgot that I
have to always generate tags from the directory of the file being linkified.
c) Fix link colors. Before we lost all syntax highlighting for functions
and Globals. Now they maintain their colors, just add an underline.
2018-12-30 00:02:42 -08:00

242 lines
21 KiB
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<a href='https://github.com/akkartik/mu/blob/master/092socket.mu'>https://github.com/akkartik/mu/blob/master/092socket.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="Comment"># Wrappers around socket primitives that are easier to test.</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span><span class="Comment"># To test server operations, just run a real client against localhost.</span>
<span id="L4" class="LineNr"> 4 </span><span class="muScenario">scenario</span> example-server-test [
<span id="L5" class="LineNr"> 5 </span> <span class="Constant">local-scope</span>
<span id="L6" class="LineNr"> 6 </span> <span class="Comment"># test server without a fake on a random (real) port</span>
<span id="L7" class="LineNr"> 7 </span> <span class="Comment"># that way repeatedly running the test will give ports time to timeout and</span>
<span id="L8" class="LineNr"> 8 </span> <span class="Comment"># close before reusing them</span>
<span id="L9" class="LineNr"> 9 </span> make-random-nondeterministic
<span id="L10" class="LineNr"> 10 </span> port:num <span class="Special">&lt;-</span> <a href='068random.mu.html#L58'>random-in-range</a><span class="Constant"> null/real-random-numbers, 8000</span>,<span class="Constant"> 8100</span>
<span id="L11" class="LineNr"> 11 </span> run [
<span id="L12" class="LineNr"> 12 </span> socket:num <span class="Special">&lt;-</span> $open-server-socket port
<span id="L13" class="LineNr"> 13 </span> assert socket, <span class="Constant">[ </span>
<span id="L14" class="LineNr"> 14 </span><span class="Constant">F - example-server-test: $open-server-socket failed]</span>
<span id="L15" class="LineNr"> 15 </span> handler-routine:number <span class="Special">&lt;-</span> <span class="muControl">start-running</span> <a href='092socket.mu.html#L55'>serve-one-request</a> socket, <a href='092socket.mu.html#L26'>example-handler</a>
<span id="L16" class="LineNr"> 16 </span> ]
<span id="L17" class="LineNr"> 17 </span> <a href='075channel.mu.html#L36'>source</a>:&amp;:<a href='075channel.mu.html#L36'>source</a>:char <span class="Special">&lt;-</span> <a href='092socket.mu.html#L69'>start-reading-from-network</a><span class="Constant"> null/real-resources,</span> <span class="Constant">[localhost/]</span>, port
<span id="L18" class="LineNr"> 18 </span> response:text <span class="Special">&lt;-</span> <a href='075channel.mu.html#L499'>drain</a> <a href='075channel.mu.html#L36'>source</a>
<span id="L19" class="LineNr"> 19 </span> 10:@:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> copy *response
<span id="L20" class="LineNr"> 20 </span> memory-should-contain [
<span id="L21" class="LineNr"> 21 </span> 10:array:character <span class="Special">&lt;-</span> <span class="Constant">[abc]</span>
<span id="L22" class="LineNr"> 22 </span> ]
<span id="L23" class="LineNr"> 23 </span> socket <span class="Special">&lt;-</span> $close-socket socket
<span id="L24" class="LineNr"> 24 </span>]
<span id="L25" class="LineNr"> 25 </span><span class="Comment"># helper just for this scenario</span>
<span id="L26" class="LineNr"> 26 </span><span class="muRecipe">def</span> <a href='092socket.mu.html#L26'>example-handler</a> query:text<span class="muRecipe"> -&gt; </span>response:text [
<span id="L27" class="LineNr"> 27 </span> <span class="Constant">local-scope</span>
<span id="L28" class="LineNr"> 28 </span> <span class="Constant">load-inputs</span>
<span id="L29" class="LineNr"> 29 </span> <span class="muControl"> return</span> <span class="Constant">[abc]</span>
<span id="L30" class="LineNr"> 30 </span>]
<span id="L31" class="LineNr"> 31 </span>
<span id="L32" class="LineNr"> 32 </span><span class="Comment"># To test client operations, use 'assume-resources' with a filename that</span>
<span id="L33" class="LineNr"> 33 </span><span class="Comment"># begins with a hostname. (Filenames starting with '/' are assumed to be</span>
<span id="L34" class="LineNr"> 34 </span><span class="Comment"># local.)</span>
<span id="L35" class="LineNr"> 35 </span><span class="muScenario">scenario</span> example-client-test [
<span id="L36" class="LineNr"> 36 </span> <span class="Constant">local-scope</span>
<span id="L37" class="LineNr"> 37 </span> assume-resources [
<span id="L38" class="LineNr"> 38 </span> <span class="Constant">[example.com/]</span> <span class="Special">&lt;-</span> [
<span id="L39" class="LineNr"> 39 </span><span class="Constant"> |abc|</span>
<span id="L40" class="LineNr"> 40 </span> ]
<span id="L41" class="LineNr"> 41 </span> ]
<span id="L42" class="LineNr"> 42 </span> run [
<span id="L43" class="LineNr"> 43 </span> <a href='075channel.mu.html#L36'>source</a>:&amp;:<a href='075channel.mu.html#L36'>source</a>:char <span class="Special">&lt;-</span> <a href='092socket.mu.html#L69'>start-reading-from-network</a> <a href='088file.mu.html#L11'>resources</a>, <span class="Constant">[example.com/]</span>
<span id="L44" class="LineNr"> 44 </span> ]
<span id="L45" class="LineNr"> 45 </span> contents:text <span class="Special">&lt;-</span> <a href='075channel.mu.html#L499'>drain</a> <a href='075channel.mu.html#L36'>source</a>
<span id="L46" class="LineNr"> 46 </span> 10:@:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> copy *contents
<span id="L47" class="LineNr"> 47 </span> memory-should-contain [
<span id="L48" class="LineNr"> 48 </span> 10:array:character <span class="Special">&lt;-</span> <span class="Constant">[abc</span>
<span id="L49" class="LineNr"> 49 </span><span class="Constant">]</span>
<span id="L50" class="LineNr"> 50 </span> ]
<span id="L51" class="LineNr"> 51 </span>]
<span id="L52" class="LineNr"> 52 </span>
<span id="L53" class="LineNr"> 53 </span><span class="muData">type</span> <a href='092socket.mu.html#L53'>request-handler</a> = (recipe text<span class="muRecipe"> -&gt; </span>text)
<span id="L54" class="LineNr"> 54 </span>
<span id="L55" class="LineNr"> 55 </span><span class="muRecipe">def</span> <a href='092socket.mu.html#L55'>serve-one-request</a> socket:num, <a href='092socket.mu.html#L53'>request-handler</a>:<a href='092socket.mu.html#L53'>request-handler</a><span class="muRecipe"> -&gt; </span>socket:num [
<span id="L56" class="LineNr"> 56 </span> <span class="Constant">local-scope</span>
<span id="L57" class="LineNr"> 57 </span> <span class="Constant">load-inputs</span>
<span id="L58" class="LineNr"> 58 </span> session:num <span class="Special">&lt;-</span> $accept socket
<span id="L59" class="LineNr"> 59 </span> assert session, <span class="Constant">[ </span>
<span id="L60" class="LineNr"> 60 </span><span class="Constant">F - example-server-test: $accept failed]</span>
<span id="L61" class="LineNr"> 61 </span> contents:&amp;:<a href='075channel.mu.html#L36'>source</a>:char, <a href='075channel.mu.html#L40'>sink</a>:&amp;:<a href='075channel.mu.html#L40'>sink</a>:char <span class="Special">&lt;-</span> <a href='075channel.mu.html#L44'>new-channel</a><span class="Constant"> 30</span>
<span id="L62" class="LineNr"> 62 </span> <span class="muControl">start-running</span> <a href='092socket.mu.html#L104'>receive-from-socket</a> session, <a href='075channel.mu.html#L40'>sink</a>
<span id="L63" class="LineNr"> 63 </span> query:text <span class="Special">&lt;-</span> <a href='075channel.mu.html#L499'>drain</a> contents
<span id="L64" class="LineNr"> 64 </span> response:text <span class="Special">&lt;-</span> call <a href='092socket.mu.html#L53'>request-handler</a>, query
<span id="L65" class="LineNr"> 65 </span> <a href='092socket.mu.html#L132'>write-to-socket</a> session, response
<span id="L66" class="LineNr"> 66 </span> session <span class="Special">&lt;-</span> $close-socket session
<span id="L67" class="LineNr"> 67 </span>]
<span id="L68" class="LineNr"> 68 </span>
<span id="L69" class="LineNr"> 69 </span><span class="muRecipe">def</span> <a href='092socket.mu.html#L69'>start-reading-from-network</a> <a href='088file.mu.html#L11'>resources</a>:&amp;:<a href='088file.mu.html#L11'>resources</a>, uri:text<span class="muRecipe"> -&gt; </span>contents:&amp;:<a href='075channel.mu.html#L36'>source</a>:char [
<span id="L70" class="LineNr"> 70 </span> <span class="Constant">local-scope</span>
<span id="L71" class="LineNr"> 71 </span> <span class="Constant">load-inputs</span>
<span id="L72" class="LineNr"> 72 </span> <span class="Delimiter">{</span>
<span id="L73" class="LineNr"> 73 </span> port:num, port-found?:boolean <span class="Special">&lt;-</span> <span class="Constant">next-input</span>
<span id="L74" class="LineNr"> 74 </span> <span class="muControl">break-if</span> port-found?
<span id="L75" class="LineNr"> 75 </span> port <span class="Special">&lt;-</span> copy <span class="Constant">80/http-port</span>
<span id="L76" class="LineNr"> 76 </span> <span class="Delimiter">}</span>
<span id="L77" class="LineNr"> 77 </span> <span class="Delimiter">{</span>
<span id="L78" class="LineNr"> 78 </span> <span class="muControl">break-unless</span> <a href='088file.mu.html#L11'>resources</a>
<span id="L79" class="LineNr"> 79 </span> <span class="Comment"># fake network</span>
<span id="L80" class="LineNr"> 80 </span> contents <span class="Special">&lt;-</span> <a href='088file.mu.html#L53'>start-reading-from-fake-resource</a> <a href='088file.mu.html#L11'>resources</a>, uri
<span id="L81" class="LineNr"> 81 </span> <span class="muControl"> return</span>
<span id="L82" class="LineNr"> 82 </span> <span class="Delimiter">}</span>
<span id="L83" class="LineNr"> 83 </span> <span class="Comment"># real network</span>
<span id="L84" class="LineNr"> 84 </span> host:text, path:text <span class="Special">&lt;-</span> <a href='092socket.mu.html#L148'>split-at</a> uri, <span class="Constant">47/slash</span>
<span id="L85" class="LineNr"> 85 </span> socket:num <span class="Special">&lt;-</span> $open-client-socket host, port
<span id="L86" class="LineNr"> 86 </span> assert socket, <span class="Constant">[contents]</span>
<span id="L87" class="LineNr"> 87 </span> req:text <span class="Special">&lt;-</span> <a href='061text.mu.html#L520'>interpolate</a> <span class="Constant">[GET _ HTTP/1.1]</span>, path
<span id="L88" class="LineNr"> 88 </span> <a href='092socket.mu.html#L93'>request-socket</a> socket, req
<span id="L89" class="LineNr"> 89 </span> contents:&amp;:<a href='075channel.mu.html#L36'>source</a>:char, <a href='075channel.mu.html#L40'>sink</a>:&amp;:<a href='075channel.mu.html#L40'>sink</a>:char <span class="Special">&lt;-</span> <a href='075channel.mu.html#L44'>new-channel</a><span class="Constant"> 10000</span>
<span id="L90" class="LineNr"> 90 </span> <span class="muControl">start-running</span> <a href='092socket.mu.html#L125'>receive-from-client-socket-and-close</a> socket, <a href='075channel.mu.html#L40'>sink</a>
<span id="L91" class="LineNr"> 91 </span>]
<span id="L92" class="LineNr"> 92 </span>
<span id="L93" class="LineNr"> 93 </span><span class="muRecipe">def</span> <a href='092socket.mu.html#L93'>request-socket</a> socket:num, s:text<span class="muRecipe"> -&gt; </span>socket:num [
<span id="L94" class="LineNr"> 94 </span> <span class="Constant">local-scope</span>
<span id="L95" class="LineNr"> 95 </span> <span class="Constant">load-inputs</span>
<span id="L96" class="LineNr"> 96 </span> <a href='092socket.mu.html#L132'>write-to-socket</a> socket, s
<span id="L97" class="LineNr"> 97 </span> $write-to-socket socket, <span class="Constant">13/cr</span>
<span id="L98" class="LineNr"> 98 </span> $write-to-socket socket, <span class="Constant">10/lf</span>
<span id="L99" class="LineNr"> 99 </span> <span class="Comment"># empty line to delimit request</span>
<span id="L100" class="LineNr">100 </span> $write-to-socket socket, <span class="Constant">13/cr</span>
<span id="L101" class="LineNr">101 </span> $write-to-socket socket, <span class="Constant">10/lf</span>
<span id="L102" class="LineNr">102 </span>]
<span id="L103" class="LineNr">103 </span>
<span id="L104" class="LineNr">104 </span><span class="muRecipe">def</span> <a href='092socket.mu.html#L104'>receive-from-socket</a> socket:num, <a href='075channel.mu.html#L40'>sink</a>:&amp;:<a href='075channel.mu.html#L40'>sink</a>:char<span class="muRecipe"> -&gt; </span><a href='075channel.mu.html#L40'>sink</a>:&amp;:<a href='075channel.mu.html#L40'>sink</a>:char, socket:num [
<span id="L105" class="LineNr">105 </span> <span class="Constant">local-scope</span>
<span id="L106" class="LineNr">106 </span> <span class="Constant">load-inputs</span>
<span id="L107" class="LineNr">107 </span> <span class="Delimiter">{</span>
<span id="L108" class="LineNr">108 </span><span class="Constant"> +next-attempt</span>
<span id="L109" class="LineNr">109 </span> c:char, found?:bool, eof?:bool, error:num <span class="Special">&lt;-</span> $read-from-socket socket
<span id="L110" class="LineNr">110 </span> <span class="muControl">break-if</span> eof?
<span id="L111" class="LineNr">111 </span> <span class="muControl">break-if</span> error
<span id="L112" class="LineNr">112 </span> <span class="Delimiter">{</span>
<span id="L113" class="LineNr">113 </span> <span class="muControl">break-unless</span> found?
<span id="L114" class="LineNr">114 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special">&lt;-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, c
<span id="L115" class="LineNr">115 </span> <span class="Delimiter">}</span>
<span id="L116" class="LineNr">116 </span> <span class="Delimiter">{</span>
<span id="L117" class="LineNr">117 </span> <span class="muControl">break-if</span> found?
<span id="L118" class="LineNr">118 </span> switch
<span id="L119" class="LineNr">119 </span> <span class="Delimiter">}</span>
<span id="L120" class="LineNr">120 </span> <span class="muControl"> loop</span>
<span id="L121" class="LineNr">121 </span> <span class="Delimiter">}</span>
<span id="L122" class="LineNr">122 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special">&lt;-</span> close <a href='075channel.mu.html#L40'>sink</a>
<span id="L123" class="LineNr">123 </span>]
<span id="L124" class="LineNr">124 </span>
<span id="L125" class="LineNr">125 </span><span class="muRecipe">def</span> <a href='092socket.mu.html#L125'>receive-from-client-socket-and-close</a> socket:num, <a href='075channel.mu.html#L40'>sink</a>:&amp;:<a href='075channel.mu.html#L40'>sink</a>:char<span class="muRecipe"> -&gt; </span><a href='075channel.mu.html#L40'>sink</a>:&amp;:<a href='075channel.mu.html#L40'>sink</a>:char, socket:num [
<span id="L126" class="LineNr">126 </span> <span class="Constant">local-scope</span>
<span id="L127" class="LineNr">127 </span> <span class="Constant">load-inputs</span>
<span id="L128" class="LineNr">128 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special">&lt;-</span> <a href='092socket.mu.html#L104'>receive-from-socket</a> socket, <a href='075channel.mu.html#L40'>sink</a>
<span id="L129" class="LineNr">129 </span> socket <span class="Special">&lt;-</span> $close-socket socket
<span id="L130" class="LineNr">130 </span>]
<span id="L131" class="LineNr">131 </span>
<span id="L132" class="LineNr">132 </span><span class="muRecipe">def</span> <a href='092socket.mu.html#L132'>write-to-socket</a> socket:num, s:text [
<span id="L133" class="LineNr">133 </span> <span class="Constant">local-scope</span>
<span id="L134" class="LineNr">134 </span> <span class="Constant">load-inputs</span>
<span id="L135" class="LineNr">135 </span> len:num <span class="Special">&lt;-</span> length *s
<span id="L136" class="LineNr">136 </span> i:num <span class="Special">&lt;-</span> copy<span class="Constant"> 0</span>
<span id="L137" class="LineNr">137 </span> <span class="Delimiter">{</span>
<span id="L138" class="LineNr">138 </span> done?:bool <span class="Special">&lt;-</span> greater-or-equal i, len
<span id="L139" class="LineNr">139 </span> <span class="muControl">break-if</span> done?
<span id="L140" class="LineNr">140 </span> c:char <span class="Special">&lt;-</span> index *s, i
<span id="L141" class="LineNr">141 </span> $write-to-socket socket, c
<span id="L142" class="LineNr">142 </span> i <span class="Special">&lt;-</span> add i,<span class="Constant"> 1</span>
<span id="L143" class="LineNr">143 </span> <span class="muControl"> loop</span>
<span id="L144" class="LineNr">144 </span> <span class="Delimiter">}</span>
<span id="L145" class="LineNr">145 </span>]
<span id="L146" class="LineNr">146 </span>
<span id="L147" class="LineNr">147 </span><span class="Comment"># like split-first, but don't eat the delimiter</span>
<span id="L148" class="LineNr">148 </span><span class="muRecipe">def</span> <a href='092socket.mu.html#L148'>split-at</a> text:text, delim:char<span class="muRecipe"> -&gt; </span>x:text, y:text [
<span id="L149" class="LineNr">149 </span> <span class="Constant">local-scope</span>
<span id="L150" class="LineNr">150 </span> <span class="Constant">load-inputs</span>
<span id="L151" class="LineNr">151 </span> <span class="Comment"># empty text? return empty texts</span>
<span id="L152" class="LineNr">152 </span> len:num <span class="Special">&lt;-</span> length *text
<span id="L153" class="LineNr">153 </span> <span class="Delimiter">{</span>
<span id="L154" class="LineNr">154 </span> empty?:bool <span class="Special">&lt;-</span> equal len,<span class="Constant"> 0</span>
<span id="L155" class="LineNr">155 </span> <span class="muControl">break-unless</span> empty?
<span id="L156" class="LineNr">156 </span> x:text <span class="Special">&lt;-</span> new <span class="Constant">[]</span>
<span id="L157" class="LineNr">157 </span> y:text <span class="Special">&lt;-</span> new <span class="Constant">[]</span>
<span id="L158" class="LineNr">158 </span> <span class="muControl"> return</span>
<span id="L159" class="LineNr">159 </span> <span class="Delimiter">}</span>
<span id="L160" class="LineNr">160 </span> idx:num <span class="Special">&lt;-</span> find-next text, delim,<span class="Constant"> 0</span>
<span id="L161" class="LineNr">161 </span> x:text <span class="Special">&lt;-</span> <a href='061text.mu.html#L1287'>copy-range</a> text,<span class="Constant"> 0</span>, idx
<span id="L162" class="LineNr">162 </span> y:text <span class="Special">&lt;-</span> <a href='061text.mu.html#L1287'>copy-range</a> text, idx, len
<span id="L163" class="LineNr">163 </span>]
<span id="L164" class="LineNr">164 </span>
<span id="L165" class="LineNr">165 </span><span class="muScenario">scenario</span> text-split-at [
<span id="L166" class="LineNr">166 </span> <span class="Constant">local-scope</span>
<span id="L167" class="LineNr">167 </span> x:text <span class="Special">&lt;-</span> new <span class="Constant">[a/b]</span>
<span id="L168" class="LineNr">168 </span> run [
<span id="L169" class="LineNr">169 </span> y:text, z:text <span class="Special">&lt;-</span> <a href='092socket.mu.html#L148'>split-at</a> x, <span class="Constant">47/slash</span>
<span id="L170" class="LineNr">170 </span> 10:@:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> copy *y
<span id="L171" class="LineNr">171 </span> 20:@:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> copy *z
<span id="L172" class="LineNr">172 </span> ]
<span id="L173" class="LineNr">173 </span> memory-should-contain [
<span id="L174" class="LineNr">174 </span> 10:array:character <span class="Special">&lt;-</span> <span class="Constant">[a]</span>
<span id="L175" class="LineNr">175 </span> 20:array:character <span class="Special">&lt;-</span> <span class="Constant">[/b]</span>
<span id="L176" class="LineNr">176 </span> ]
<span id="L177" class="LineNr">177 </span>]
</pre>
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