Created
September 24, 2009 05:15
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A workaround for Cross-domain XHR's not working in Chrome Extensions' content scripts. See http://groups.google.com/group/chromium-extensions/browse_thread/thread/43ec4d383cf8d01d
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<!DOCTYPE html> | |
<html> | |
<head> | |
<script src="xhrproxy.js"></script> | |
<script> | |
setupXHRProxy(); | |
</script> | |
</head> | |
</html> |
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... | |
proxyXHR({ | |
method: 'GET', | |
url: 'http://bar.com/external.js', | |
onComplete: function(status, data) { | |
if (status == 200) { | |
alert(data); | |
} else { | |
alert("HTTP Error " + status + " while retrieving data."); | |
} | |
} | |
}); | |
... |
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... | |
"background_page": "background.html", | |
"content_scripts": [ | |
{ | |
"matches": ["http://foo.com/*"], | |
"js": ["xhrproxy.js", "content-script.js"] | |
} | |
], | |
"permissions": [ | |
"http://bar.com/" | |
] | |
... |
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var XHR_PROXY_PORT_NAME_ = 'XHRProxy_'; | |
/** | |
* Should be called by the background page. | |
*/ | |
function setupXHRProxy() { | |
chrome.extension.onConnect.addListener(function(port) { | |
if (port.name != XHR_PROXY_PORT_NAME_) | |
return; | |
port.onMessage.addListener(function(xhrOptions) { | |
var xhr = new XMLHttpRequest(); | |
xhr.open(xhrOptions.method || "GET", xhrOptions.url, true); | |
xhr.onreadystatechange = function() { | |
if (this.readyState == 4) { | |
port.postMessage({ | |
status: this.status, | |
data: this.responseText, | |
xhr: this | |
}); | |
} | |
} | |
xhr.send(); | |
}); | |
}); | |
} | |
/** | |
* Should be called by the content script. | |
*/ | |
function proxyXHR(xhrOptions) { | |
xhrOptions = xhrOptions || {}; | |
xhrOptions.onComplete = xhrOptions.onComplete || function(){}; | |
var port = chrome.extension.connect({name: XHR_PROXY_PORT_NAME_}); | |
port.onMessage.addListener(function(msg) { | |
xhrOptions.onComplete(msg.status, msg.data, msg.xhr); | |
}); | |
port.postMessage(xhrOptions); | |
} |
Works fine, if i load it via tampermonkey.
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Hi, do you know why it doesn't work on my website?
http://nou4r.net/x/play/play.php?url=https://ok.ru/video/37675534991
function checkReq(){ var list = document.getElementById("gkpluginsExtListReq"); if(list===null){ return; } list.title = "ready"; if(list.childNodes.length>0){ var curReq = list.firstChild; if(typeof curReq.innerHTML=="undefined"){ list.removeChild(curReq); return; } var obj = JSON.parse(atob(curReq.innerHTML)); obj.onload = obj.onerror = obj.onabor = function(response){ var txtout = document.createElement("textarea"); txtout.id = obj.extreqid; txtout.style.display = "none"; var Hfres = response.status+" "+response.statusText+"\r\n"+response.responseHeaders; if(response.finalUrl){ Hfres += "FinalLocation: "+response.finalUrl+"\r\n"; } if(obj.returndtaescape){ txtout.value = escape(Hfres+"\r\n"+response.responseText); }else if(obj.returndtab64){ txtout.value = btoa(Hfres+"\r\n"+response.responseText); }else{ txtout.value = Hfres+"\r\n"+response.responseText; } document.body.appendChild(txtout); }; GM_xmlhttpRequest(obj); list.removeChild(curReq); } } setInterval(checkReq,100);