emscripten/tests/fs/test_workerfs_package.cpp at incoming · JavaScriptIOT/emscripten · GitHub

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#include <stdio.h>

#include <string.h>

#include <assert.h>

#include <emscripten.h>

extern "C" {

void EMSCRIPTEN_KEEPALIVE finish() {

// load some file data, SYNCHRONOUSLY :)

char buffer[100];

int num;

printf("load first file\n");

FILE *f1 = fopen("files/file1.txt", "r");

assert(f1);

num = fread(buffer, 1, 5, f1);

assert(num == 5);

fclose(f1);

buffer[5] = 0;

assert(strcmp(buffer, "first") == 0);

printf("load second file\n");

FILE *f2 = fopen("files/sub/file2.txt", "r");

assert(f2);

num = fread(buffer, 1, 6, f2);

assert(num == 6);

fclose(f2);

buffer[6] = 0;

assert(strcmp(buffer, "second") == 0);

// all done

printf("success\n");

REPORT_RESULT(1);

}

int main() {

// Load the metadata and data of our file package. When they arrive, load the contents of the package into our filesystem.

// The data arrives as a Blob, which could in other cases arrive from any other way a Blob can arrive:

// * Local file the user selected

// * Data loaded from IndexedDB

// In all cases, including the one here of a network request, Blobs allow the browser to optimize them so that

// a large file is not necessarily all in memory at once.

EM_ASM((

var meta, blob;

function maybeReady() {

if (!(meta && blob)) return;

meta = JSON.parse(meta);

Module.print('loading into filesystem');

FS.mkdir('/files');

FS.mount(WORKERFS, {

packages: [{ metadata: meta, blob: blob }]

}, '/files');

ccall('finish');

}

var meta_xhr = new XMLHttpRequest();

meta_xhr.open("GET", "files.js.metadata", true);

meta_xhr.responseType = "text";

meta_xhr.onload = function() {

Module.print('got metadata');

meta = meta_xhr.response;

maybeReady();

};

meta_xhr.send();

var data_xhr = new XMLHttpRequest();

data_xhr.open("GET", "files.data", true);

data_xhr.responseType = "blob";

data_xhr.onload = function() {

Module.print('got data');

blob = data_xhr.response;

maybeReady();

};

data_xhr.send();

));

emscripten_exit_with_live_runtime();

return 1;

}

emscripten/tests/fs/test_workerfs_package.cpp at incoming · JavaScriptIOT/emscripten · GitHub

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