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author | Wojtek Kosior <koszko@koszko.org> | 2022-03-15 10:12:06 +0100 |
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committer | Wojtek Kosior <koszko@koszko.org> | 2022-03-24 20:43:40 +0100 |
commit | bbc9fae4291d0c2cb3976d158ecd20e0bd2a8ea0 (patch) | |
tree | 9d72c3184f85b61d3d71bc2d65cddb8058d9222a /html/repo_query_cacher_client.js | |
parent | 65351e8c69659455096d1e37c4b78d1298fb7021 (diff) | |
download | browser-extension-bbc9fae4291d0c2cb3976d158ecd20e0bd2a8ea0.tar.gz browser-extension-bbc9fae4291d0c2cb3976d158ecd20e0bd2a8ea0.zip |
serialize and deserialize entire Response object when relaying fetch() calls to other contexts using sendMessage
Diffstat (limited to 'html/repo_query_cacher_client.js')
-rw-r--r-- | html/repo_query_cacher_client.js | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/html/repo_query_cacher_client.js b/html/repo_query_cacher_client.js new file mode 100644 index 0000000..b7f49e9 --- /dev/null +++ b/html/repo_query_cacher_client.js @@ -0,0 +1,85 @@ +/** + * This file is part of Haketilo. + * + * Function: Making requests to remote repositories through a response cache in + * operating in the content script of a browser tab. + * + * Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * As additional permission under GNU GPL version 3 section 7, you + * may distribute forms of that code without the copy of the GNU + * GPL normally required by section 4, provided you include this + * license notice and, in case of non-source distribution, a URL + * through which recipients can access the Corresponding Source. + * If you modify file(s) with this exception, you may extend this + * exception to your version of the file(s), but you are not + * obligated to do so. If you do not wish to do so, delete this + * exception statement from your version. + * + * As a special exception to the GPL, any HTML file which merely + * makes function calls to this code, and for that purpose + * includes it by reference shall be deemed a separate work for + * copyright law purposes. If you modify this code, you may extend + * this exception to your version of the code, but you are not + * obligated to do so. If you do not wish to do so, delete this + * exception statement from your version. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + * + * I, Wojtek Kosior, thereby promise not to sue for violation of this file's + * license. Although I request that you do not make use of this code in a + * proprietary program, I am not going to enforce this in court. + */ + +#FROM common/browser.js IMPORT browser + +/* + * This is a complementary function to error_data_jsonifiable() in + * common/misc.js. + */ +function error_from_jsonifiable_data(jsonifiable) { + const arg_props = ["message", "fileName", "lineNumber"]; + return new window[jsonifiable.name](...arg_props.map(p => jsonifiable[p])); +} + +/* + * Make it possible to recover a Response object. This is a complementary + * function to response_data_jsonifiable() in background/CORS_bypass_server.js. + */ +function response_from_jsonifiable_data(jsonifiable) { + const body = jsonifiable.body, body_len = body.length / 2; + const body_buf = new Uint8Array(body_len); + + for (let i = 0; i < body_len; i++) + body_buf[i] = parseInt(`0x${body.substring(i * 2, i * 2 + 2)}`); + + const init = { + status: jsonifiable.status, + statusText: jsonifiable.statusText, + headers: new Headers(jsonifiable.headers) + }; + + return new Response(body_buf, init); +} + +async function indirect_fetch(tab_id, url) { + const msg = ["repo_query", url]; + const jsonifiable = await browser.tabs.sendMessage(tab_id, msg); + + if ("error" in jsonifiable) + throw error_from_jsonifiable_data(jsonifiable); + + return response_from_jsonifiable_data(jsonifiable); +} +#EXPORT indirect_fetch |