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request_listener.js
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request_listener.js
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var VALID_CONTENT = [".mp4", ".webm", ".mp3", ".aac", ".wav"];
var videoFilter = {
urls : ["<all_urls>"],
types: ["other", "object", "sub_frame"]
};
var mobile = false;
chrome.webRequest.onBeforeSendHeaders.addListener(function(details){
var headers = details.requestHeaders;
if (mobile) {
for (var i = 0; i < headers.length; i++) {
if (headers[i].name === "User-Agent")
headers[i].value = "Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7";
}
}
return {
requestHeaders : headers
};
}, {urls : ["<all_urls>"]}, ["requestHeaders", "blocking"]);
chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
mobile = false;
});
chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
if (request.from === 'content') {
if (request.subject === 'showPageAction') {
// init logic from content script
sendResponse(mobile);
} else if (request.subject === 'mobileChange') {
mobile = request.useMobile;
chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
chrome.tabs.executeScript(tabs[0].id, {code: 'window.location.reload(true);'});
});
}
}
});
chrome.webRequest.onBeforeRequest.addListener(addRequestToSession, videoFilter);
chrome.webRequest.onCompleted.addListener(addRequestToSession, videoFilter);
function addRequestToSession(request) {
if (!containsASubstring(request.url, VALID_CONTENT))
return;
// we can send it back to the page
var message = {
from: 'request_listener',
subject: "contentFound",
payload: {
request: request,
useMobile: mobile
}
};
chrome.tabs.sendMessage(request.tabId, message, function(resp) { /* ... */ });
}
function containsASubstring(string, array) {
for (var el in array) {
if (string.indexOf(array[el]) !== -1)
return true;
}
return false;
}