使用 Java 中的“Content-Disposition"标题通过 REST 服务下载 PDF 文件 [英] Download a PDF file via REST service with “Content-Disposition” Header in java

问题描述

我正在尝试在自定义身份验证检查后从 Java REST 调用的响应中下载 PDF 文件.

我可以看到下载的文件，但它是空文件.

下面是我的代码片段.

//自定义HTTPClientHTTPAuthClient 客户端 = 新的 HTTPAuthClient(url,username,password)请求请求 = 新请求(下载地址)；//我正在下载一个 URL 的文件内容.响应 response = client.executeGet(request);String response1 = response.getResponseBody();InputStream is = new ByteArrayInputStream(response.getBytes());response.setContentType("Content-type",application/pdf);//这里的响应是//javax.servlet.HttpServletResponseresponse.setHeader("Content-Disposition","attachment;filename="myfile.pdf");IOUtils.copy(is,response.getOutPutStream());response.flushBuffer();

使用此代码我可以下载文件，但是当我打开文件并验证没有数据时.作为响应正文的一部分，我还可以看到一些数据.

你能帮我找出我做错的地方吗?我尝试了很多选择，但没有找到解决方案.

解决方案

如何使用 setContentType

response.setContentType("Content-type",application/pdf);

如果这个方法中只有一个可用的参数是 String void setContentType(String type) 那么你的方法应该是:

response.setContentType("application/pdf");

Java 文档是肯定的.>

I am trying to download a PDF file from a response of Java REST call after custom authentication check.

I can see downloaded file but it is empty file.

Below is my code snippet.

//Custom HTTPClient
HTTPAuthClient client = new HTTPAuthClient(url,username,password)
Request request = new Request(downloadURL); //I'm downloading file content of an URL.
Response response = client.executeGet(request);
String response1 = response.getResponseBody();
InputStream is = new ByteArrayInputStream(response.getBytes());
response.setContentType("Content-type",application/pdf); //here response is      //javax.servlet.HttpServletResponse
response.setHeader("Content-Disposition","attachment;filename="myfile.pdf");
IOUtils.copy(is,response.getOutPutStream());
response.flushBuffer();    

With this code I could download the file but when I open the file and verified there is no data. As part of response body also I can see some data.

Could you please help me out where I'm doing mistake I tried many options but did not find solution.

解决方案

How can you use setContentType like this

response.setContentType("Content-type",application/pdf);

If only one avalible param in this method is String void setContentType(String type) so your method should be:

response.setContentType("application/pdf");

Java Doc to be sure.

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