我正在看这个问题,它是http://hacks.mozilla.org/2011/03/the- shortest-image-uploader-ever/的链接,其中包含以下代码:
var fd = new FormData(); fd.append("image", file); // Append the file fd.append("key", "6528448c258cff474ca9701c5bab6927"); // Get your own key: http://api.imgur.com/ // Create the XHR (Cross-Domain XHR FTW!!!) var xhr = new XMLHttpRequest(); xhr.open("POST", "http://api.imgur.com/2/upload.json"); // Boooom! xhr.onload = function() { // Big win! // The URL of the image is: JSON.parse(xhr.responseText).upload.links.imgur_page; } // Ok, I don't handle the errors. An exercice for the reader. // And now, we send the formdata xhr.send(fd);
此跨域请求如何工作?我认为通常有一些安全限制阻止人们这样做。
服务器正在响应,并将Access-Control-Allow-Origin设置为允许跨域请求
Response Headers Access-Control-Allow-Origin: * Cache-Control max-age=604800 Connection keep-alive Content-Length 494 Content-Type application/json
http://www.w3.org/TR/cors/#access-control-allow-origin-response- hea
http://hacks.mozilla.org/2009/07/cross-site-xmlhttprequest-with- cors