使用GET请求跨2个API下载PDF [英] Downloading PDF across 2 APIs using GET request

问题描述

我正在尝试通过GET请求下载跨越两个API的PDF文件.

Im trying to download a PDF file crossing over two API's with a GET Request.

如果我直接使用API​​2，则可以使用以下代码很好地下载PDF:

If I go direct to API2 the PDF downloads fine with the below code:

Stream fileStream = File.Open(fileLocation, FileMode.Open);
result.Content = new StreamContent(fileStream);
result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");
result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
FileName = "test.pdf"
}; 
return result;

但是，当我将API1放入混音中时，事情会变得有点不可思议！

However when I throw API1 into the mix things get a little wonky!!

using (System.Net.Http.HttpClient client = new System.Net.Http.HttpClient())
{
var httpRequestMessage = new HttpRequestMessage();
httpRequestMessage.Method = HttpMethod.Get;
httpRequestMessage.RequestUri = new Uri(requestUrl);
HttpResponseMessage response = await client.SendAsync(httpRequestMessage);

if (response.StatusCode == System.Net.HttpStatusCode.OK)
{
var content = await response.Content.ReadAsStringAsync();
response.Content = new StringContent(content);
response.EnsureSuccessStatusCode();
response.Content.Headers.ContentEncoding.Add("UTF8");
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
FileName = "test.pdf"
};
return response;

直接进入API2会产生:％PDF-1.6％âãÏÓ

Going direct to API2 produces: %PDF-1.6%âãÏÓ

通过API2生成:％PDF-1.6％

Going via API2 produces:%PDF-1.6%����

我曾经尝试更改API1上的ContentType和ContentEncoding，但没有任何乐趣.

Ive tried changing ContentType and ContentEncoding on API1 with no joy.

有什么东西跳出来吗?

推荐答案

在二进制文档上调用 .ReadAsStringAsync 无法正常工作-您必须调用 .ReadAsByteArrayAsync .您还必须使用 ByteArrayContent 而不是 StringContent .

Calling .ReadAsStringAsync on a binary document wont work - you have to call .ReadAsByteArrayAsync. You also have to use ByteArrayContent instead of StringContent.

未经测试

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