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// Copyright 2016 The Emscripten Authors. All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License. Both these licenses can be
// found in the LICENSE file.
#include <stdio.h>
#include <string.h>
#include <emscripten/fetch.h>
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.
}
void downloadProgress(emscripten_fetch_t *fetch)
{
printf("Downloading %s.. %.2f%s complete. HTTP readyState: %d. HTTP status: %d.\n"
"HTTP statusText: %s. Received chunk [%llu, %llu[\n",
fetch->url, (fetch->totalBytes > 0) ? ((fetch->dataOffset + fetch->numBytes) * 100.0 / fetch->totalBytes) : (double)(fetch->dataOffset + fetch->numBytes),
(fetch->totalBytes > 0) ? "%" : " bytes",
fetch->readyState, fetch->status, fetch->statusText,
fetch->dataOffset, fetch->dataOffset + fetch->numBytes);
// Process the partial data stream fetch->data[0] thru fetch->data[fetch->numBytes-1]
// This buffer represents the file at offset fetch->dataOffset.
for(size_t i = 0; i < fetch->numBytes; ++i)
; // Process fetch->data[i];
}
int main()
{
emscripten_fetch_attr_t attr;
emscripten_fetch_attr_init(&attr);
strcpy(attr.requestMethod, "GET");
attr.attributes = EMSCRIPTEN_FETCH_STREAM_DATA;
attr.onsuccess = downloadSucceeded;
attr.onprogress = downloadProgress;
attr.onerror = downloadFailed;
attr.timeoutMSecs = 2*60;
emscripten_fetch(&attr, "myfile.dat");
}
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