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Implement HTTPClient in HTML5 platform

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Limitations:

 - Subject to same-origin policy
 - No persistent connection (but simulated for compatibility)
 - No blocking mode
 - No StreamPeer access
 - No chunked responses
 - Cannot disable host verification
This commit is contained in:
Leon Krause 2017-10-26 03:39:41 +02:00
parent faf21d895e
commit 2970061a73
7 changed files with 633 additions and 70 deletions
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145
platform/javascript/http_request.js Normal file
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/*************************************************************************/
/* http_request.js */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
var GodotHTTPRequest = {
$GodotHTTPRequest: {
requests: [],
getUnusedRequestId: function() {
var idMax = GodotHTTPRequest.requests.length;
for (var potentialId = 0; potentialId < idMax; ++potentialId) {
if (GodotHTTPRequest.requests[potentialId] instanceof XMLHttpRequest) {
continue;
}
return potentialId;
}
GodotHTTPRequest.requests.push(null)
return idMax;
},
setupRequest: function(xhr) {
xhr.responseType = 'arraybuffer';
},
},
godot_xhr_new: function() {
var newId = GodotHTTPRequest.getUnusedRequestId();
GodotHTTPRequest.requests[newId] = new XMLHttpRequest;
GodotHTTPRequest.setupRequest(GodotHTTPRequest.requests[newId]);
return newId;
},
godot_xhr_reset: function(xhrId) {
GodotHTTPRequest.requests[xhrId] = new XMLHttpRequest;
GodotHTTPRequest.setupRequest(GodotHTTPRequest.requests[xhrId]);
},
godot_xhr_free: function(xhrId) {
GodotHTTPRequest.requests[xhrId].abort();
GodotHTTPRequest.requests[xhrId] = null;
},
godot_xhr_open: function(xhrId, method, url, user, password) {
user = user > 0 ? UTF8ToString(user) : null;
password = password > 0 ? UTF8ToString(password) : null;
GodotHTTPRequest.requests[xhrId].open(UTF8ToString(method), UTF8ToString(url), true, user, password);
},
godot_xhr_set_request_header: function(xhrId, header, value) {
GodotHTTPRequest.requests[xhrId].setRequestHeader(UTF8ToString(header), UTF8ToString(value));
},
godot_xhr_send_null: function(xhrId) {
GodotHTTPRequest.requests[xhrId].send();
},
godot_xhr_send_string: function(xhrId, strPtr) {
if (!strPtr) {
Module.printErr("Failed to send string per XHR: null pointer");
return;
}
GodotHTTPRequest.requests[xhrId].send(UTF8ToString(strPtr));
},
godot_xhr_send_data: function(xhrId, ptr, len) {
if (!ptr) {
Module.printErr("Failed to send data per XHR: null pointer");
return;
}
if (len < 0) {
Module.printErr("Failed to send data per XHR: buffer length less than 0");
return;
}
GodotHTTPRequest.requests[xhrId].send(HEAPU8.subarray(ptr, ptr + len));
},
godot_xhr_abort: function(xhrId) {
GodotHTTPRequest.requests[xhrId].abort();
},
godot_xhr_get_status: function(xhrId) {
return GodotHTTPRequest.requests[xhrId].status;
},
godot_xhr_get_ready_state: function(xhrId) {
return GodotHTTPRequest.requests[xhrId].readyState;
},
godot_xhr_get_response_headers_length: function(xhrId) {
var headers = GodotHTTPRequest.requests[xhrId].getAllResponseHeaders();
return headers === null ? 0 : lengthBytesUTF8(headers);
},
godot_xhr_get_response_headers: function(xhrId, dst, len) {
var str = GodotHTTPRequest.requests[xhrId].getAllResponseHeaders();
if (str === null)
return;
var buf = new Uint8Array(len + 1);
stringToUTF8Array(str, buf, 0, buf.length);
buf = buf.subarray(0, -1);
HEAPU8.set(buf, dst);
},
godot_xhr_get_response_length: function(xhrId) {
var body = GodotHTTPRequest.requests[xhrId].response;
return body === null ? 0 : body.byteLength;
},
godot_xhr_get_response: function(xhrId, dst, len) {
var buf = GodotHTTPRequest.requests[xhrId].response;
if (buf === null)
return;
buf = new Uint8Array(buf).subarray(0, len);
HEAPU8.set(buf, dst);
},
};
autoAddDeps(GodotHTTPRequest, "$GodotHTTPRequest");
mergeInto(LibraryManager.library, GodotHTTPRequest);