1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
'use strict';
{
let xmlFeedOrImage = /^(?:(?:application|text)\/(?:(?:r(?:ss|df)|atom)\+)xml(;|$))|image\//i;
let rawXml = /^(?:application|text)\/xml;/i;
let brokenXMLOnLoad;
let pendingRequests = new Map();
let reloadingTabs = new Map();
let tabKey = (tabId, url) => `${tabId}:${url}`;
let cleanup = r => {
pendingRequests.delete(r.requestId);
let key = tabKey(r.tabId, r.url);
if (reloadingTabs.get(key) === false) {
reloadingTabs.delete(key);
}
};
let executeAll = async request => {
let {url, tabId, frameId, requestId} = request;
let scripts = pendingRequests.get(requestId);
if (!scripts) return -1;
pendingRequests.delete(requestId);
let count = 0;
for (let details of scripts.values()) {
details = Object.assign({
runAt: "document_start",
matchAboutBlank: true,
frameId,
}, details);
try {
for (let attempts = 10; attempts-- > 0;) {
try {
await browser.tabs.executeScript(tabId, details);
} catch(e) {
if (!/No matching message handler/.test(e.message)) throw e;
debug("Couldn't inject script into %s: too early? Retrying up to %s times...", url, attempts);
}
}
count++;
debug("Execute on start OK", url, details);
} catch (e) {
error(e, "Execute on start failed", url, details);
}
}
return count;
};
{
let filter = {
urls: ["<all_urls>"],
types: ["main_frame", "sub_frame", "object"]
};
let wr = browser.webRequest;
for (let event of ["onCompleted", "onErrorOccurred"])
wr[event].addListener(cleanup, filter);
filter.types = ["main_frame"];
wr.onResponseStarted.addListener(executeAll, filter);
}
var RequestUtil = {
getResponseMetaData(request) {
return request.response || (request.response = new ResponseMetaData(request));
},
async executeOnStart(request, details) {
let {requestId, url, tabId, frameId, statusCode} = request;
if (statusCode >= 300 && statusCode < 400) return;
if (frameId === 0) {
let key = tabKey(tabId, url);
debug("Checking whether %s is a reloading tab...", key);
if (reloadingTabs.get(key)) {
reloadingTabs.set(key, false); // doom it for removal in cleanup
return;
}
}
let response = this.getResponseMetaData(request);
let {contentType, contentDisposition} = response;
if (contentDisposition ||
xmlFeedOrImage.test(contentType) && !/\/svg\b/i.test(contentType)) {
debug("Skipping execute on start of %s %o.", url, response);
return;
}
debug("Injecting script on start in %s (%o).", url, response);
let scripts = pendingRequests.get(requestId);
let scriptKey = JSON.stringify(details);
if (!scripts) {
pendingRequests.set(requestId, scripts = new Map());
scripts.set(scriptKey, details);
} else {
scripts.set(scriptKey, details);
return;
}
if (/^(?:application|text)\//.test(contentType)
&& !/[^;]+\b(html|xml)\b/i.test(contentType)) {
debug("Not HTML: defer script to onResponseStarted for %s (%o)", url, response);
return;
}
if (typeof brokenXMLOnLoad === "undefined") {
brokenXMLOnLoad = await (async () => parseInt((await browser.runtime.getBrowserInfo()).version) < 61)();
}
let mustCheckFeed = brokenXMLOnLoad && frameId === 0 && rawXml.test(contentType);
debug("mustCheckFeed = %s, brokenXMLOnLoad = %s", mustCheckFeed, brokenXMLOnLoad);
let filter = browser.webRequest.filterResponseData(requestId);
let buffer = [];
let first = true;
let done = false;
let mustReload = false;
let runAndFlush = async () => {
let scriptsRan = await executeAll(request);
if (mustCheckFeed && !scriptsRan) {
mustReload = true;
debug(`Marking as "must reload"`, tabId, url);
reloadingTabs.set(tabKey(tabId, url), true);
}
if (buffer && buffer.length) {
debug("Flushing %s buffer chunks", buffer.length);
for (let chunk of buffer) {
filter.write(chunk);
}
filter.disconnect();
buffer = null;
}
if (done) {
filter.onstop(null);
}
};
filter.ondata = event => {
if (first) {
runAndFlush();
first = false;
}
if (buffer) {
debug("buffering", url);
buffer.push(event.data);
return;
}
debug("ondata", url);
filter.write(event.data);
filter.disconnect();
};
filter.onstop = event => {
done = true;
if (mustReload && !buffer) {
mustReload = false;
browser.tabs.update(tabId, {url});
}
}
}
}
}
|