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<pre id='vimCodeElement'>
<span class="Comment"># Wrappers around socket primitives that are easier to test.</span>
<span class="Comment"># To test server operations, just run a real client against localhost.</span>
<span class="muScenario">scenario</span> example-server-test [
<span class="Constant">local-scope</span>
<span class="Comment"># test server without a fake on a random (real) port</span>
<span class="Comment"># that way repeatedly running the test will give ports time to timeout and</span>
<span class="Comment"># close before reusing them</span>
make-random-nondeterministic
port:num <span class="Special"><-</span> random-in-range <span class="Constant">0/real-random-numbers</span>,<span class="Constant"> 8000</span>,<span class="Constant"> 8100</span>
run [
socket:num <span class="Special"><-</span> $open-server-socket port
assert socket, <span class="Constant">[ </span>
<span class="Constant">F - example-server-test: $open-server-socket failed]</span>
handler-routine:number <span class="Special"><-</span> start-running serve-one-request socket, example-handler
]
source:&:source:char <span class="Special"><-</span> start-reading-from-network <span class="Constant">0/real-resources</span>, <span class="Constant">[localhost/]</span>, port
response:text <span class="Special"><-</span> drain source
10:@:char/<span class="Special">raw</span> <span class="Special"><-</span> copy *response
memory-should-contain [
10:array:character <span class="Special"><-</span> <span class="Constant">[abc]</span>
]
]
<span class="Comment"># helper just for this scenario</span>
<span class="muRecipe">def</span> example-handler query:text<span class="muRecipe"> -> </span>response:text [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="muControl">reply</span> <span class="Constant">[abc]</span>
]
<span class="Comment"># To test client operations, use `assume-resources` with a filename that</span>
<span class="Comment"># begins with a hostname. (Filenames starting with '/' are assumed to be</span>
<span class="Comment"># local.)</span>
<span class="muScenario">scenario</span> example-client-test [
<span class="Constant">local-scope</span>
assume-resources [
<span class="Constant">[example.com/]</span> <span class="Special"><-</span> [
<span class="Constant"> |abc|</span>
]
]
run [
source:&:source:char <span class="Special"><-</span> start-reading-from-network resources, <span class="Constant">[example.com/]</span>
]
contents:text <span class="Special"><-</span> drain source
10:@:char/<span class="Special">raw</span> <span class="Special"><-</span> copy *contents
memory-should-contain [
10:array:character <span class="Special"><-</span> <span class="Constant">[abc</span>
<span class="Constant">]</span>
]
]
<span class="muData">type</span> request-handler = (recipe text<span class="muRecipe"> -> </span>text)
<span class="muRecipe">def</span> serve-one-request socket:num, request-handler:request-handler [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
session:num <span class="Special"><-</span> $accept socket
assert session, <span class="Constant">[ </span>
<span class="Constant">F - example-server-test: $accept failed]</span>
contents:&:source:char, sink:&:sink:char <span class="Special"><-</span> new-channel<span class="Constant"> 30</span>
sink <span class="Special"><-</span> start-running receive-from-socket session, sink
query:text <span class="Special"><-</span> drain contents
response:text <span class="Special"><-</span> call request-handler, query
write-to-socket session, response
$close-socket session
]
<span class="muRecipe">def</span> start-reading-from-network resources:&:resources, uri:text<span class="muRecipe"> -> </span>contents:&:source:char [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="Delimiter">{</span>
port:num, port-found?:boolean <span class="Special"><-</span> <span class="Constant">next-ingredient</span>
<span class="muControl">break-if</span> port-found?
port <span class="Special"><-</span> copy <span class="Constant">80/http-port</span>
<span class="Delimiter">}</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> resources
<span class="Comment"># fake network</span>
contents <span class="Special"><-</span> start-reading-from-fake-resources resources, uri
<span class="muControl">return</span>
<span class="Delimiter">}</span>
<span class="Comment"># real network</span>
host:text, path:text <span class="Special"><-</span> split-at uri, <span class="Constant">47/slash</span>
socket:num <span class="Special"><-</span> $open-client-socket host, port
assert socket, <span class="Constant">[contents]</span>
req:text <span class="Special"><-</span> interpolate <span class="Constant">[GET _ HTTP/1.1]</span>, path
request-socket socket, req
contents:&:source:char, sink:&:sink:char <span class="Special"><-</span> new-channel<span class="Constant"> 10000</span>
start-running receive-from-socket socket, sink
]
<span class="muRecipe">def</span> request-socket socket:num, s:text<span class="muRecipe"> -> </span>socket:num [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
write-to-socket socket, s
$write-to-socket socket, <span class="Constant">13/cr</span>
$write-to-socket socket, <span class="Constant">10/lf</span>
<span class="Comment"># empty line to delimit request</span>
$write-to-socket socket, <span class="Constant">13/cr</span>
$write-to-socket socket, <span class="Constant">10/lf</span>
]
<span class="muRecipe">def</span> receive-from-socket socket:num, sink:&:sink:char<span class="muRecipe"> -> </span>sink:&:sink:char [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="Delimiter">{</span>
<span class="Constant"> +next-attempt</span>
req:text, found?:bool, eof?:bool, error:num <span class="Special"><-</span> $read-from-socket socket, <span class="Constant">4096/bytes</span>
<span class="muControl">break-if</span> error
<span class="Delimiter">{</span>
<span class="muControl">break-if</span> found?
switch
<span class="muControl">loop</span> <span class="Constant">+next-attempt</span>
<span class="Delimiter">}</span>
bytes-read:num <span class="Special"><-</span> length *req
i:num <span class="Special"><-</span> copy<span class="Constant"> 0</span>
<span class="Delimiter">{</span>
done?:bool <span class="Special"><-</span> greater-or-equal i, bytes-read
<span class="muControl">break-if</span> done?
c:char <span class="Special"><-</span> index *req, i <span class="Comment"># todo: unicode</span>
sink <span class="Special"><-</span> write sink, c
i <span class="Special"><-</span> add i,<span class="Constant"> 1</span>
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
<span class="muControl">loop-unless</span> eof?
<span class="Delimiter">}</span>
sink <span class="Special"><-</span> close sink
]
<span class="muRecipe">def</span> write-to-socket socket:num, s:text [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
len:num <span class="Special"><-</span> length *s
i:num <span class="Special"><-</span> copy<span class="Constant"> 0</span>
<span class="Delimiter">{</span>
done?:bool <span class="Special"><-</span> greater-or-equal i, len
<span class="muControl">break-if</span> done?
c:char <span class="Special"><-</span> index *s, i
$write-to-socket socket, c
i <span class="Special"><-</span> add i,<span class="Constant"> 1</span>
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
]
<span class="Comment"># like split-first, but don't eat the delimiter</span>
<span class="muRecipe">def</span> split-at text:text, delim:char<span class="muRecipe"> -> </span>x:text, y:text [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="Comment"># empty text? return empty texts</span>
len:num <span class="Special"><-</span> length *text
<span class="Delimiter">{</span>
empty?:bool <span class="Special"><-</span> equal len,<span class="Constant"> 0</span>
<span class="muControl">break-unless</span> empty?
x:text <span class="Special"><-</span> new <span class="Constant">[]</span>
y:text <span class="Special"><-</span> new <span class="Constant">[]</span>
<span class="muControl">return</span>
<span class="Delimiter">}</span>
idx:num <span class="Special"><-</span> find-next text, delim,<span class="Constant"> 0</span>
x:text <span class="Special"><-</span> copy-range text,<span class="Constant"> 0</span>, idx
y:text <span class="Special"><-</span> copy-range text, idx, len
]
<span class="muScenario">scenario</span> text-split-at [
<span class="Constant">local-scope</span>
x:text <span class="Special"><-</span> new <span class="Constant">[a/b]</span>
run [
y:text, z:text <span class="Special"><-</span> split-at x, <span class="Constant">47/slash</span>
10:@:char/<span class="Special">raw</span> <span class="Special"><-</span> copy *y
20:@:char/<span class="Special">raw</span> <span class="Special"><-</span> copy *z
]
memory-should-contain [
10:array:character <span class="Special"><-</span> <span class="Constant">[a]</span>
20:array:character <span class="Special"><-</span> <span class="Constant">[/b]</span>
]
]
</pre>
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