【发布时间】：2021-04-07 06:13:57
【问题描述】：
我有一个使用 Java 的示例工作解决方案，但我需要一个可以从旧数据库系统调用的 C# 解决方案。
所以基本上创建一个带有自定义标头的请求，加载一个 Word 文档，然后发送请求。然后服务器将转换 Word 文档并返回 PDF，然后需要将其保存到磁盘。
有人可以帮忙吗。
Java 代码
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
public class NewMain {
public static void main(String[] args) throws IOException {
String source = args[0];
String target = args[1];
URL url = new URL("http://localhost:9998");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type",
"application/vnd.com.documents4j.any-msword");
conn.setRequestProperty("Accept", "application/pdf");
conn.setRequestProperty("Converter-Job-Priority", "1000");
// File wordFile = new File("C:/temp2/Sample.doc");
File wordFile = new File(source);
InputStream targetStream = new FileInputStream(wordFile);
OutputStream os = conn.getOutputStream();
long length = targetStream.transferTo(os);
os.flush();
if (conn.getResponseCode() != HttpURLConnection.HTTP_OK) {
throw new RuntimeException("Failed : HTTP error code : "
+ conn.getResponseCode());
}
InputStream in = conn.getInputStream();
// OutputStream out = new FileOutputStream("C:/temp2/Sample-BBB-doc.pdf");
OutputStream out = new FileOutputStream(target);
byte[] buffer = new byte[1024];
int len;
while ((len = in.read(buffer)) != -1) {
out.write(buffer, 0, len);
}
in.close();
out.close();
os.close();
conn.disconnect();
}
}
以下是我一直在处理的 C# 代码 [注意暂时不要尝试保存返回的 PDF] - 下面是服务器响应：
using System;
using System.Net;
using System.IO;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Net.Http.Headers;
namespace HttpPOST10
{
class Program
{
public static string MyUri { get; private set; }
static void Main(string[] args)
{
string url = "http://localhost:9998";
Uri myUri = new Uri(url);
string filePath = @"C:\temp2";
string srcFilename = @"C:\temp2\Sample.doc";
string destFileName = @"C:\temp3\Sample.pdf";
UploadFile(url, filePath, srcFilename, destFileName);
}
private static bool UploadFile(string url, string filePath, string srcFilename, string destFileName)
{
HttpClient httpClient = new HttpClient();
using var fileStream = new FileStream(srcFilename, FileMode.Open);
var fileInfo = new FileInfo(srcFilename);
var httpRequestMessage = new HttpRequestMessage
{
Method = HttpMethod.Post,
RequestUri = new Uri(url),
Headers = {
{ HttpRequestHeader.ContentType.ToString(), "application/vnd.com.documents4j.any-msword" },
{ HttpRequestHeader.Accept.ToString(), "application/pdf" },
{"Converter-Job-Priority", "1000"}
},
Content = new StreamContent(fileStream)
};
Console.Write("httpRequestMessage:" + httpRequestMessage);
var response = httpClient.SendAsync(httpRequestMessage).Result;
Console.Write("response:" + response);
return true;
}
}
}
Http 响应：
httpRequestMessage:Method: POST, RequestUri: 'http://localhost:9998/', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
ContentType: application/vnd.com.documents4j.any-msword
Accept: application/pdf
Converter-Job-Priority: 1000
}response:StatusCode: 500, ReasonPhrase: 'Request failed.', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
Connection: close
Content-Length: 1031
Content-Type: text/html; charset=ISO-8859-1
替代解决方案 restSharp
我今天取得了一些进展，并设法在 restSharp 中创建了一个基本的工作解决方案。这源于调查 Postman 中的工作方式并从生成的代码 sn-p 开始。挑战在于识别源文档以便上传（对于每个文件参数的用途似乎有点混乱）：
using System;
using System.IO;
using System.Net;
using RestSharp;
using RestSharp.Extensions;
namespace HttpPOST12RestSharp
{
class Program
{
static void Main(string[] args)
{
var source = "C:\\temp2\\Sample.doc";
var target = @"C:\temp3\Sample-HttpPOST12RestSharp.pdf";
var client = new RestClient("http://localhost:9998");
client.Timeout = -1;
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type", "application/vnd.com.documents4j.any-msword");
request.AddHeader("Accept", "application/pdf");
request.AddHeader("Converter-Job-Priority", " 1000");
request.AddParameter("application/vnd.com.documents4j.any-msword", File.ReadAllBytes(source), Path.GetFileName(source), ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
Console.WriteLine("response.StatusCode: " + response.StatusCode);
if (response.StatusCode != HttpStatusCode.OK)
{
throw new Exception($"Unable to download file");
}
else
{
response.RawBytes.SaveAs(target);
Console.WriteLine("Target Document: " + target);
}
}
}
}
【问题讨论】：
-
这能回答你的问题吗？ Upload image using HttpClient
-
感谢 Eldar - 我遇到了这个问题，但无法取得任何进展 - 我正在添加一些 C# 代码，让我在其中的一部分 - Http 请求至少得到了响应。跨度>
标签： java c# post httpclient documents4j