SDWebImage 和设置自定义 HTTP 标头? [英] SDWebImage and setting custom HTTP headers?

问题描述

我刚刚将用于缓存图像的代码从 EGOImageCache 更改为 SDWebView.不幸的是，我不知道如何设置自定义 HTTP 标头，因为我必须发送身份验证才能获取图像.使用 EGOImageCache 很容易完成，因为我在适当的地方扩展了 NSURLRequest.但我不知道如何使用 SDWebView.framework 做到这一点.我看到了标题，我在 SDWebImageDownloader.h 中找到了包含

I´ve just changed my code for caching images away from EGOImageCache to SDWebView. Unfortunately i don´t know how to set custom HTTP headers as i have to send authentification to be able to fetch images. It was easy done with EGOImageCache as i´ve extended the NSURLRequest at the appropriate place. But i don´t know how to do that with the SDWebView.framework. I see the headers and i´ve found methods in SDWebImageDownloader.h containing

    /**
 * Set a value for a HTTP header to be appended to each download HTTP request.
 *
 * @param value The value for the header field. Use `nil` value to remove the header.
 * @param field The name of the header field to set.
 */
- (void)setValue:(NSString *)value forHTTPHeaderField:(NSString *)field;

/**
 * Returns the value of the specified HTTP header field.
 *
 * @return The value associated with the header field field, or `nil` if there is no corresponding header field.
 */
- (NSString *)valueForHTTPHeaderField:(NSString *)field;

似乎该库确实支持 HTTP 标头.但是当我使用 UIImageView+WebCache.h 时，我看不到设置标题的选项.在我的代码中，我调用了

It seems that the lib does support HTTP headers. But as i use UIImageView+WebCache.h i can´t see there an option for setting the headers. In my code i call

[self.imageView setImageWithURL:[NSURL URLWithString:themeImageURL] placeholderImage:[UIImage imageNamed:@"placeholder.png"]];

谁能告诉我如何设置 HTTP 标头?

Can anybody tell me how to set HTTP headers?

推荐答案

我也遇到了同样的问题，我试着做:

I had the same problem, and I tried to make:

SDWebImageDownloader *manager = [SDWebImageDownloader sharedDownloader];
[manager setValue:username forHTTPHeaderField:@"X-Oauth-Username"];

但是标头没有发送.经过一些尝试，我遇到了问题，sharedDownloader 的 SDWebImageDownloader 会创建一个新的 SDWebImageDownloader 实例，因此当您将标头放在该实例上时，真正下载图像的实例没有标头.

But the header were not send. After some tries, I came across the problem, SDWebImageDownloader at sharedDownloader makes a new instance of SDWebImageDownloader, so when you put the header at that instance, the instance that really downloads the image don't has the header.

我已经解决了这个问题:

I've solved making this:

SDWebImageDownloader *manager = [SDWebImageManager sharedManager].imageDownloader;
[manager setValue:username forHTTPHeaderField:@"X-Oauth-Username"];

这篇关于SDWebImage 和设置自定义 HTTP 标头?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！