page, and the path is similar to https://image-1257049018.cos.png, which can be displayed and downloaded normally. However, when drawing this picture (remote address) with canvas, it was mistakenly said that the cross-domain
code is as follows
,response header
try adding the following line before setting img.src
img.crossOrigin = "Anonymous";if not, please post your source code
see that many people misunderstand that it has been sent 10 times at a time, which is added like this: if the user can click the button continuously and send a request one time at a time, a li, will be generated after each response result. Because of ...
What is the nature of the xmlhttprequest object in ajax? Is the API encapsulated for operating http? Is the process of the ajax request that the browser starts a thread to make the http request? ...
requirements: want to add a js script to the page to get the Headers information of the current page. problems encountered: now you can only get Response Headers data, using the following code: var req = new XMLHttpRequest(); req.open( GET , ...
WeChat Mini Programs, the backend changed the interface for uploading pictures. Said to use PUT to upload files. Check Mini Program s document, which says that the API uploads local resources to the developer server and the client initiates a HTTPS POST...
I want to download directly when I open a link. By default, opening a link will automatically open a preview in the browser. Can nodejs add header to the url before opening the link? exports.download = async (ctx,next) => { ctx.type = applicat...
chrome, safari,ie are all normal report an error under firefox [Firefox cannot establish a connection to the ws: ~ server] this is the only error message tried the setting in about:config, but it is not valid and window.MozWebSocket is undef...
RT whether the keep-alive in the HTTP request corresponds to interface reuse or domain name reuse. has been learning this knowledge recently, and inadvertently sees this problem and looks confused again. ...
I am a novice. I have just come into contact with the node.js and express frameworks. I have configured routing according to the online tutorial, but there are some problems, as follows: first of all, the file structure is as follows: index.js:...
...
...
when uploading a large file, whether it is possible to switch pages without affecting the upload (non-breakpoint continuation), and how to achieve ...
http is a stateless protocol that cannot identify who is accessing the application. So use token as the key between the client and the server for identification. but when does the front-end request need to carry token? Is it necessary to access those in...
background: the frontend needs to pass two values of projectId and fileList [] to the backend. normally, I just need to encapsulate these two values in a data and pass them to the backend, which will receive them. But now, the back-end interfac...