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<!DOCTYPE html>
<!--
Copyright (c) 2013 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<link rel="import" href="/tracing/base/base.html">
<link rel="import" href="/tracing/base/in_memory_trace_stream.html">
<script>
'use strict';
tr.exportTo('tr.b', function() {
let fs;
if (tr.isNode) fs = require('fs');
function guessBinary(url) {
return /[.]gz$/.test(url) || /[.]zip$/.test(url);
}
function xhr(method, url, async, opt_data, forceBinary) {
const req = new XMLHttpRequest();
req.overrideMimeType('text/plain; charset=x-user-defined');
req.open(method, url, async);
const isBinary = forceBinary;
if (isBinary === undefined) {
guessBinary(url);
if (isBinary && async) req.responseType = 'arraybuffer';
}
const data = opt_data !== undefined ? opt_data : null;
if (!async) {
req.send(data);
if (req.status === 200) return req.responseText;
throw new Error('XHR failed with status ' + req.status +
' for url ' + url);
}
const p = new Promise(function(resolve, reject) {
req.onreadystatechange = function(aEvt) {
if (req.readyState !== 4) return;
tr.b.timeout(0).then(() => {
if (req.status !== 200) {
reject(new Error('XHR failed with status ' + req.status +
' for url ' + url));
return;
}
if (req.responseType === 'arraybuffer') {
resolve(req.response);
return;
}
resolve(req.responseText);
});
};
});
req.send(data);
return p;
}
function getAsync(url) {
// Browser.
if (!tr.isHeadless) return xhr('GET', url, true);
// Node or vinn prep.
let filename;
if (url.startsWith('file:///')) {
filename = url.substring(7);
} else {
filename = global.HTMLImportsLoader.hrefToAbsolutePath(url);
}
const isBinary = guessBinary(url);
// Node.
if (tr.isNode) {
const encoding = isBinary ? undefined : 'utf8';
return new Promise(function(resolve, reject) {
fs.readFile(filename, encoding, function(err, data) {
if (err) {
reject(err);
return;
}
resolve(data);
});
});
}
// Vinn.
return Promise.resolve().then(function() {
if (isBinary) return readbuffer(filename);
return read(filename);
});
}
function getSync(url, asTraceStream) {
// Browser.
if (!tr.isHeadless) return xhr('GET', url, false);
// Node or vinn prep.
let filename;
if (url.startsWith('file:///')) { // posix
filename = url.substring(7);
} else if (url.startsWith('file://') && url[8] === ':') { // win
filename = url.substring(7);
} else {
filename = global.HTMLImportsLoader.hrefToAbsolutePath(url);
}
const isBinary = guessBinary(url);
// Node.
if (tr.isNode) {
const encoding = isBinary ? undefined : 'utf8';
return fs.readFileSync(filename, encoding);
}
// Vinn.
try {
if (asTraceStream) {
return new tr.b.InMemoryTraceStream(
new Uint8Array(readbuffer(filename)), isBinary);
} else if (isBinary) {
return readbuffer(filename);
}
return read(filename);
} catch (ex) {
if (ex.message) {
ex.message += ' when reading ' + filename;
throw ex;
}
throw new Error(ex + ' when reading' + filename);
}
}
function postAsync(url, data) {
if (tr.isHeadless) {
throw new Error('Only supported inside a browser');
}
return xhr('POST', url, true, data);
}
function postTextAsync(url, data) {
if (tr.isHeadless) {
throw new Error('Only supported inside a browser');
}
return xhr('POST', url, true, data, false);
}
return {
getAsync,
getSync,
postAsync,
};
});
</script>
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