include certs in compiled output

client/build.sh

@@ -7,16 +7,13 @@ LIB_DIR="build/curl-wasm/lib/"
 CACERT_FILE="cacert.pem"
 OUT_FILE="out/libcurl.js"
 
-EXPORTED_FUNCS="_main,_perform_request"
+EXPORTED_FUNCS="_load_certs,_perform_request"
 RUNTIME_METHODS="addFunction,removeFunction,allocate,ALLOC_NORMAL"
 COMPILER_OPTIONS="-o $OUT_FILE -lcurl -lssl -lcrypto -lcjson -I $INCLUDE_DIR -L $LIB_DIR"
-EMSCRIPTEN_OPTIONS="-lwebsocket.js -sWEBSOCKET_URL=wss://debug.ading.dev/ws -sSINGLE_FILE -sASYNCIFY -sALLOW_TABLE_GROWTH -sEXPORTED_FUNCTIONS=$EXPORTED_FUNCS -sEXPORTED_RUNTIME_METHODS=$RUNTIME_METHODS --preload-file $CACERT_FILE"
-
-if [ ! -f $CACERT_FILE ]; then
-  wget "https://curl.se/ca/cacert.pem" -O $CACERT_FILE
-fi
+EMSCRIPTEN_OPTIONS="-lwebsocket.js -sWEBSOCKET_URL=wss://debug.ading.dev/ws -sSINGLE_FILE -sASYNCIFY -sALLOW_TABLE_GROWTH -sEXPORTED_FUNCTIONS=$EXPORTED_FUNCS -sEXPORTED_RUNTIME_METHODS=$RUNTIME_METHODS"
 
 tools/all_deps.sh
+tools/generate_cert.sh
 
 rm -rf out
 mkdir -p out

client/main.c

@@ -1,12 +1,13 @@
 #include <stdlib.h>
 #include <stdio.h>
-#include <emscripten.h>
 #include <string.h>
+#include <emscripten.h>
 
 #include "curl/curl.h"
-#include "cjson/cJSON.h"
 #include "curl/easy.h"
 #include "curl/header.h"
+#include "cjson/cJSON.h"
+#include "cacert.h"
 
 typedef void(*DataCallback)(char* chunk_ptr, int chunk_size);
 typedef void(*EndCallback)(int error, char* response_json);
@@ -170,6 +171,8 @@ char* copy_bytes(const char* ptr, const int size) {
   return new_ptr;
 }
 
-int main() {
-  printf("emscripten libcurl module loaded\n");
+void load_certs() {
+  FILE *file = fopen("/cacert.pem", "wb");
+  fwrite(_cacert_pem, 1, _cacert_pem_len, file);
+  fclose(file);
 }

client/main.js

@@ -67,6 +67,33 @@ const status_messages = {
   511: "Network Authentication Required"
 }
 
+//a case insensitive dictionary for request headers
+class Headers {
+  constructor(obj) {
+    for (let key in obj) {
+      this[key] = obj[key];
+    }
+    return new Proxy(this, this);
+  }
+  get(target, prop) {
+    let keys = Object.keys(this);
+    for (let key of keys) {
+      if (key.toLowerCase() === prop.toLowerCase()) {
+        return this[key];
+      }
+    }
+  }
+  set(target, prop, value) {
+    let keys = Object.keys(this);
+    for (let key of keys) {
+      if (key.toLowerCase() === prop.toLowerCase()) {
+        this[key] = value;
+      }
+    }
+    this[prop] = value;
+  }
+}
+
 function is_str(obj) {
   return typeof obj === 'string' || obj instanceof String;
 }
@@ -145,7 +172,7 @@ function create_response(response_data, response_info) {
   return response_obj;
 }
 
-function libcurl_fetch(url, params={}) {
+function create_options(params) {
   let body = null;
   if (params.body) {
     if (is_str(params.body)) {
@@ -156,10 +183,22 @@ function libcurl_fetch(url, params={}) {
     }
     params.body = true;
   }
+
+  if (!params.headers) params.headers = {};
+  params.headers = new Headers(params.headers);
+
   if (params.referer) {
-    if (!params.headers) params.headers = {};
     params.headers["Referer"] = params.referer;
   }
+  if (!params.headers["User-Agent"]) {
+    params.headers["User-Agent"] = navigator.userAgent;
+  }
+
+  return body;
+}
+
+function libcurl_fetch(url, params={}) {
+  let body = create_options(params);
 
   return new Promise((resolve, reject) => {
     let chunks = [];
@@ -180,6 +219,8 @@ function libcurl_fetch(url, params={}) {
 }
 
 async function main() {
+  console.log("emscripten module loaded");
+  _load_certs();
   console.log(await libcurl_fetch("https://httpbin.org/anything"));
 }
 

client/tools/generate_cert.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+#export ca certs to a c header file
+
+set -e
+
+CURL_PREFIX=$(realpath build/curl-wasm)
+CACERT_FILE="$(realpath build/cacert.pem)"
+CACERT_HEADER="$CURL_PREFIX/include/cacert.h"
+
+CACERT_DIR="$(dirname $CACERT_FILE)"
+REPLACE_STR="$(echo $CACERT_DIR | tr '/-' '_')"
+
+if [ ! -f $CACERT_FILE ]; then
+  wget "https://curl.se/ca/cacert.pem" -O $CACERT_FILE
+fi
+xxd -i $CACERT_FILE > $CACERT_HEADER
+sed -i "s/$REPLACE_STR//" $CACERT_HEADER