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'use strict';
{
let pendingRequests = new Map();
let cleanup = r => {
pendingRequests.delete(r.requestId);
};
let filter = {
urls: ["<all_urls>"],
types: ["main_frame", "sub_frame", "object"]
};
browser.webRequest.onCompleted.addListener(cleanup, filter);
browser.webRequest.onErrorOccurred.addListener(cleanup, filter);
var RequestUtil = {
getContentMetaData(request) {
if (request.content) return request.content;
let {responseHeaders} = request;
let content = request.content = {};
for (let h of responseHeaders) {
if (/^\s*Content-(Type|Disposition)\s*$/i.test(h.name)) {
content[h.name.split("-")[1].trim().toLowerCase()] = h.value;
}
}
return content;
},
async executeOnStart(request, details) {
let {requestId, tabId, frameId} = request;
let scripts = pendingRequests.get(requestId);
let scriptKey = JSON.stringify(details);
if (!scripts) {
pendingRequests.set(requestId, scripts = new Map());
scripts.set(scriptKey, details);
} else {
scripts.set(scriptKey, details);
return;
}
let filter = browser.webRequest.filterResponseData(requestId);
let buffer = [];
let content = this.getContentMetaData(request);
filter.onstart = async event => {
if (/ml$/i.test(content.type)) {
filter.write(new Uint8Array()); // work-around for https://bugzilla.mozilla.org/show_bug.cgi?id=1410755
}
for (let details of scripts.values()) {
details = Object.assign({
runAt: "document_start",
frameId,
}, details);
try {
await browser.tabs.executeScript(tabId, details);
debug("Execute on start OK", request.url, details);
} catch (e) {
error(e, "Execute on start failed", request.url, details);
}
}
if (buffer.length) {
debug("Flushing %s buffer chunks", buffer.length);
for (let chunk of buffer) {
filter.write(chunk);
}
filter.disconnect();
buffer = null;
}
};
filter.ondata = event => {
if (buffer) {
buffer.push(event.data);
return;
}
filter.write(event.data);
filter.disconnect();
}
}
}
}
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