【html与c交互|html与c交互 webassembly,c – 是否可以使用WebAssembly提交HTTP请求（）】我正在尝试在WebAssembly中提交一个简单的HTTP GET请求.为此,我编写了这个程序(从
Emscripten site复制,稍作修改)：
#include
#include
#ifdef __EMSCRIPTEN__
#include
#include
#endif
void downloadSucceeded(emscripten_fetch_t *fetch) {
printf("Finished downloading %llu bytes from URL %s.\n", fetch->numBytes, fetch->url);
// The data is now available at fetch->data[0] through fetch->data[fetch->numBytes-1];
emscripten_fetch_close(fetch);
// Free data associated with the fetch.
}
void downloadFailed(emscripten_fetch_t *fetch) {
printf("Downloading %s failed, HTTP failure status code: %d.\n", fetch->url, fetch->status);
emscripten_fetch_close(fetch);
// Also free data on failure.
}
unsigned int EMSCRIPTEN_KEEPALIVE GetRequest() {
emscripten_fetch_attr_t attr;
emscripten_fetch_attr_init(&attr);
strcpy(attr.requestMethod, "GET");
attr.attributes = EMSCRIPTEN_FETCH_LOAD_TO_MEMORY;
attr.onsuccess = downloadSucceeded;
attr.onerror = downloadFailed;
emscripten_fetch(&attr, "http://google.com");
return 1;
}
当我使用$EMSCRIPTEN / emcc main.c编译它时-O1 -s MODULARIZE = 1 -s WASM = 1 -o main.js –emrun -s FETCH = 1我得到错误
ERROR:root:FETCH not yet compatible with wasm (shared.make_fetch_worker is asm.js-specific)
有没有办法从WebAssembly运行HTTP请求？如果是,我该怎么办？
更新1：以下代码尝试发送GET请求,但由于CORS问题而失败.
#include
#include
#ifdef __EMSCRIPTEN__
#include
#include
#endif
unsigned int EMSCRIPTEN_KEEPALIVE GetRequest() {
EM_ASM({
var xhr = new XMLHttpRequest();
xhr.open("GET", "http://google.com");
xhr.send();
});
return 1;
}
