Set custom header for every HttpRequest

[yorkwang]

As I know, SDWebImage's http header can be modified as below:

SDWebImageDownloader *manager = [SDWebImageManager sharedManager].imageDownloader;
if (coverRefer.length > 0) {
[manager setValue:coverRefer forHTTPHeaderField:@"Referer"];
}

In my application, I have a tableView with 3 different http referers. How can I custom header for every HttpRequest?

[bpoplauschi]

The [SDWebImageManager sharedManager].imageDownloader is actually the same as [SDWebImageDownloader sharedDownloader]. You just need to set the HTTP headers for that instance.

[lehelmedves]

Hello,

Actually, this does not solve the problem of not being able with the above code, to set a different header for each call. How should this be handled? Having a shared downloader means, that a different value for the same header key cannot be set for the different calls.

[dreampiggy]

@lehelmedves See the #2020. The comments here show the solution.

For 4.x, you can only use headersFilter property in SDWebImageDownloader. You can use a switch case or some extra information for the URL, to decide which of url should be appending the addtional headers.

For 5.x, you should use requestModifier property in SDWebImageDownloader. It gives you a NSURLRequest and you can modify anything then return the new one. Besides the central control in SDWebImageDownloader property, it also has one context option named SDWebImageContextDownloadRequestModifier, to allow you to specify request modifier for each of image request. So you can directlly set the header during sd_setImageWithURL:

[lehelmedves]

@dreampiggy thank you so much for your help!