我尝试使用代理从我的网络应用程序调用外部网站。此外,还需要在此外部网站上执行 POST 请求。
我正在使用:tomcat7、org.apache.httpcomponents 4.3.4、spring。
以下操作,无需代理即可正常工作,我得到响应状态“200”;
// uri = "https://punkte.eiv-fobi.de/upload/upload.do"
private HttpStatus sendPost(URI uri, File file)
throws ClientProtocolException, IOException {
HttpClient httpClient = HttpClientBuilder.create().build();
HttpPost httpPost = new HttpPost(uri);
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
FileBody fileBody = new FileBody(file, ContentType.MULTIPART_FORM_DATA);
builder.addPart(PART_NAME, fileBody);
httpPost.setEntity(builder.build());
HttpResponse response = httpClient.execute(httpPost);
return HttpStatus.valueOf(response.getStatusLine().getStatusCode());
}
现在我尝试添加代理:
// uri = "https://punkte.eiv-fobi.de/upload/upload.do"
public HttpStatus sendPostWithProxy(URI uri, File file) throws Exception {
try {
// JVM Parameter: -Dhttps.proxyHost and -Dhttps.proxyPort
String proxyHost = System.getProperty("https.proxyHost");
String proxyPort = System.getProperty("https.proxyPort");
HttpClient httpClient = HttpClientBuilder.create().build();
// CloseableHttpClient httpClient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(uri);
HttpHost proxy = new HttpHost(proxyHost,
Integer.valueOf(proxyPort), "https");
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
FileBody fileBody = new FileBody(file,
ContentType.MULTIPART_FORM_DATA);
builder.addPart(PART_NAME, fileBody);
httpPost.setEntity(builder.build());
RequestConfig config = RequestConfig.custom().setProxy(proxy)
.build();
httpPost.setConfig(config);
HttpResponse response = httpClient.execute(httpPost);
return HttpStatus.valueOf(response.getStatusLine().getStatusCode());
} catch (Exception e) {
LOGGER.error(
"exception occurred.",
e);
}
return null;
}
出现以下异常:
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
我错了什么?替代品?
最佳答案
我可以想到一些可能导致此问题的问题:
您确定您的 https 代理不需要身份验证吗?在这种情况下,您可能需要在上下文中设置凭据并使用上下文和客户端执行请求。检查此示例:http://www.the-swamp.info/blog/java-request-through-proxy/
由于您使用 https 代理并请求 https url(SSL/TLS 端点安全),因此您可能会遇到证书验证问题。检查 https 代理的这个很好的解释:Pros and cons of using a Http proxy v/s https proxy?
关于Java HttpClient - 通过代理发布文件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28154383/