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use curl multi interface for async support

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ading2210 2024-01-03 02:27:32 -05:00
parent 643fc8e463
commit 465fa2e170
3 changed files with 52 additions and 28 deletions
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11
client/build.sh
View file

@ -5,14 +5,19 @@ LIB_DIR="build/curl-wasm/lib/"
CACERT_FILE="cacert.pem"
OUT_FILE="out/libcurl.js"
EXPORTED_FUNCS="_main"
COMPILER_OPTIONS="-o $OUT_FILE -Os -lcurl -lssl -lcrypto -I $INCLUDE_DIR -L $LIB_DIR"
EMSCRIPTEN_OPTIONS="-lwebsocket.js -sWEBSOCKET_URL=wss://debug.ading.dev/ws -pthread -sPROXY_TO_PTHREAD -sEXPORTED_FUNCTIONS=$EXPORTED_FUNCS --preload-file $CACERT_FILE"
EXPORTED_FUNCS="_main,_do_request"
COMPILER_OPTIONS="-o $OUT_FILE -lcurl -lssl -lcrypto -I $INCLUDE_DIR -L $LIB_DIR"
EMSCRIPTEN_OPTIONS="-lwebsocket.js -sWEBSOCKET_URL=wss://debug.ading.dev/ws -sASYNCIFY -sALLOW_UNIMPLEMENTED_SYSCALLS -sEXPORTED_FUNCTIONS=$EXPORTED_FUNCS --preload-file $CACERT_FILE"
if [ ! -f $CACERT_FILE ]; then
wget "https://curl.se/ca/cacert.pem" -O $CACERT_FILE
fi
if [ ! -d $INCLUDE_DIR ]; then
tools/openssl.sh
tools/curl.sh
fi
COMPILE_CMD="emcc main.c $COMPILER_OPTIONS $EMSCRIPTEN_OPTIONS"
echo $COMPILE_CMD
$COMPILE_CMD

1
client/index.html
View file

@ -3,6 +3,7 @@
<head>
<script src="./out/libcurl.js"></script>
<script src="./main.js"></script>
<link rel="icon" href="data:;base64,=">
</head>
<body>
<p>emscripten tests</p>

68
client/main.c
View file

@ -1,34 +1,52 @@
#include "emscripten/emscripten.h"
#include <stdio.h>
#include <curl/curl.h>
#include <emscripten.h>
int main() {
CURL *curl;
CURLcode res;
char* url = "https://ading.dev/";
int do_request(const char* url) {
printf("downloading %s\n", url);
CURL *http_handle;
CURLM *multi_handle;
int still_running = 1;
curl = curl_easy_init();
if (curl) {
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_PROXY, "socks5h://127.0.0.1:1234");
curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
curl_easy_setopt(curl, CURLOPT_CAINFO, "/cacert.pem");
curl_easy_setopt(curl, CURLOPT_CAPATH, "/cacert.pem");
/* example.com is redirected, so we tell libcurl to follow redirection */
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
curl_global_init(CURL_GLOBAL_DEFAULT);
http_handle = curl_easy_init();
/* Perform the request, res will get the return code */
res = curl_easy_perform(curl);
/* Check for errors */
if(res != CURLE_OK)
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res));
curl_easy_setopt(http_handle, CURLOPT_URL, url);
curl_easy_setopt(http_handle, CURLOPT_PROXY, "socks5h://127.0.0.1:1234");
curl_easy_setopt(http_handle, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
curl_easy_setopt(http_handle, CURLOPT_CAINFO, "/cacert.pem");
curl_easy_setopt(http_handle, CURLOPT_CAPATH, "/cacert.pem");
multi_handle = curl_multi_init();
curl_multi_add_handle(multi_handle, http_handle);
do {
CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
if(!mc)
mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
if(mc) {
fprintf(stderr, "curl_multi_poll() failed, code %d.\n", (int)mc);
break;
}
//ensure we dont block the main thread
emscripten_sleep(0);
} while(still_running);
curl_multi_remove_handle(multi_handle, http_handle);
curl_easy_cleanup(http_handle);
curl_multi_cleanup(multi_handle);
curl_global_cleanup();
/* always cleanup */
curl_easy_cleanup(curl);
}
return 0;
}
int main() {
printf("emscripten libcurl module loaded\n");
do_request("https://ifconfig.me/all");
}