我有一个Java应用程序，我想连接到REST服务。我想连接到Jira实例以获取一些项目详细信息作为JSON。
这是我的类，用于连接和从休息服务获取JSON
public String connect() throws CustomException, IOException {
HttpParams params = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(params, TIMEOUT);
HttpConnectionParams.setSoTimeout(params, TIMEOUT);
DefaultHttpClient httpClient = new DefaultHttpClient(params);
try {
UrlValidator validator = new UrlValidator();
if (!validator.isValid(webServiceUrl)) {
throw new CustomException("URL is invalid.");
}
String encode = userName + COLON + password;
String auth = Base64Encoder.encode(encode.getBytes());
HttpGet request = new HttpGet(webServiceUrl);
request.addHeader(HttpHeaders.AUTHORIZATION, BASIC + auth);
request.addHeader(HttpHeaders.CONTENT_TYPE, "application/json");
request.addHeader(HttpHeaders.ACCEPT, "application/json");
HttpResponse response = httpClient.execute(request);
stringResponse = getStatusBody(response);
} catch (HttpHostConnectException e) {
throw new CustomException("URL is invalid.");
} catch (ConnectTimeoutException e) {
throw new CustomException("URL is invalid.");
} finally {
httpClient.getConnectionManager().shutdown();
}
return stringResponse;
}
private String getStatusBody(HttpResponse response) throws CustomException,
IOException {
int statusCode = response.getStatusLine().getStatusCode();
switch (statusCode) {
case HttpStatus.SC_OK:
String contentType = response.getHeaders(HttpHeaders.CONTENT_TYPE)[0]
.getValue();
if (contentType.contains(TEXT_HTML)) {
throw new CustomException("URL is invalid.");
} else {
stringResponse = new BasicResponseHandler()
.handleResponse(response);
}
break;
case HttpStatus.SC_NOT_FOUND:
throw new CustomException("URL is invalid.");
case HttpStatus.SC_UNAUTHORIZED:
case HttpStatus.SC_FORBIDDEN:
throw new CustomException("Invalid username and/or password.");
default:
throw new HttpResponseException(statusCode, response
.getStatusLine().getReasonPhrase());
}
return stringResponse;
}
当我使用带有Jira中存在的项目名称的URL运行以下内容时，它正常工作并提供JSON响应。 但是，如果我提供的网址为
http://jira.mydomain.com/rest/api/2/search?jql=project=projectname
工作正常，因为Jira中有项目名称 projectname 。
http://jira.mydomain.com/rest/api/2/search?jql=project=project
它提供了错误的请求异常，因为Jira中没有名称为 project 的项目。
问题是如果我在谷歌浏览器中的浏览器或POSTMAN客户端中尝试URL，它会给出一个带有错误信息的JSON，如下所示
{
"errorMessages": [
"The value 'project' does not exist for the field 'project'."
],
"errors": {}
}
但是通过代码，以下异常我会收到错误请求。
org.apache.http.client.HttpResponseException: Bad Request
at com.app.rest.RestHttpClient.getStatusBody(RestHttpClient.java:114)
at com.app.rest.RestHttpClient.connect(RestHttpClient.java:81)
at com.app.rest.Connector.connect(Connector.java:39)
at com.app.rest.connector.SourceConnector.connect(SourceConnector.java:22)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:100)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:604)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:565)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1085)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:146)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:277)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
为什么在浏览器中我获得JSON并且在Apache Http客户端中我收到错误的请求？
我正在使用Apache HTTP客户端4.2.5版本。