这是我的实现，

full_url = url + '?' + params
            req = urllib2.Request(full_url, params)

            req.add_header('Content-Type', 'application/javascript')
            req.add_header('Access-Control-Allow-Origin','*')
            req.add_header('Accept', 'application/javascript')
            req.add_header('x-lang', 'en')
            req.add_header('x-app-version', '1.2.3')
            req.add_header('x-consumer-key', 'abc')
            req.add_header('x-source', 'web')
            req.add_header('x-device-id', 'abc-2501015753736970469271537365900144030')
            req.add_header('x-signature', signature)
            req.add_header('X-Content-Type-Options', 'nosniff')
            req.add_header('x-request-id', request)
            req.add_header('x-timestamp', timeStamp)

            response = urllib2.urlopen(req)
            result   = response.read()
            result   = result.decode('latin-1')
            respjson = json.loads(result)

            return respjson

读取ext.js中的输出

var script = document.createElement("script");

        script.setAttribute("src", url);
        script.setAttribute("type", "text/javascript");
        script.setAttribute("id", trans.scriptId);
        document.getElementsByTagName("head")[0].appendChild(script);

提前谢谢你。
浏览器中显示错误“即使其MIME类型（“application/json”）不是有效的JavaScript MIME，也已加载”
[浏览器错误][1]