如何接受包含引号的字符集 [英] How to accept a charset containing quotes

问题描述

ReadAsStringAsync方法中有一个错误，该错误会阻止Content-Type看起来像application/json; charset="utf-8"被读取.似乎还没有针对它的框架修复程序，但是有任何解决方法吗?

There's a bug in the ReadAsStringAsync method that prevents a Content-Type looking like application/json; charset="utf-8" from being read. It doesn't look like there's a framework fix for it yet, but are there any workarounds?

推荐答案

在阅读响应之前，需要删除引号:

Before you read the response, you need to remove the quotes:

var contentType = response.Content.Headers.ContentType;
if (contentType.CharSet?.Contains('"') == true) {
    contentType.CharSet = contentType.CharSet.Replace("\"", "");
}

这是我正在使用的完整DelegatingHandler:

Here's the complete DelegatingHandler that I'm using:

public class StripCharSetQuotesHandler : DelegatingHandler
{

    public StripCharSetQuotesHandler(HttpClientHandler innerHandler) {
        : base(innerHandler)
    {
        // Nothing additional.
    }

    protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) {
        var response = await base.SendAsync(request, cancellationToken);

        var contentType = response.Content.Headers.ContentType;
        if (contentType.CharSet?.Contains('"') == true) {
            contentType.CharSet = contentType.CharSet.Replace("\"", "");
        }

        return response;
    }

}

您要确保删除的引号尽可能靠近HttpClientHandler，这就是构造函数接受HttpClientHandler而不是HttpMessageHandler的原因.

You want to make sure that you're stripping the quotes as close to the HttpClientHandler as possible, which is why the constructor accepts an HttpClientHandler and not an HttpMessageHandler.

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