使用RestTemplate获取Http请求 - org.springframework.web.client.ResourceAccessException

Question

我在下面的代码中使用RestTemplate做一个GET请求。如果我直接从chromepostman调用它，请求可以正常工作。但是，从代码中看，它却不能正常工作。它似乎忽略了rootUri。

import org.springframework.boot.web.client.RestTemplateBuilder
import org.springframework.stereotype.Component
import org.springframework.web.client.RestTemplate

@Component
class Provider(
    private val builder: RestTemplateBuilder
) {
    var client: RestTemplate = builder.rootUri("http://foo.test.com/API/rest").build()

    fun sendMessage(request: Request) {

        println("here is the request")
        try {
            val resp = client.getForEntity(
                "?userid=123456&password=1234356&method=TEST_MESSAGE", Response::class.java
            )
        } catch (e: Exception) {
            println("this is the error")
            e.printStackTrace()
        }
    }

}

这是我得到的异常。

org.springframework.web.client.ResourceAccessException: I/O error on GET request for "": null; nested exception is org.apache.http.client.ClientProtocolException
....
....
Caused by: org.apache.http.client.ClientProtocolException
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:187)
Caused by: org.apache.http.client.ClientProtocolException
....
....
Caused by: org.apache.http.ProtocolException: Target host is not specified
    at org.apache.http.impl.conn.DefaultRoutePlanner.determineRoute(DefaultRoutePlanner.java:71)
    at org.apache.http.impl.client.InternalHttpClient.determineRoute(InternalHttpClient.java:125)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
Caused by: org.apache.http.ProtocolException: Target host is not specified

完整的跟踪在 http:/collabedit.comt6h2f

任何帮助都是感激的。先谢谢你。

编辑--有什么方法可以从restTemplate中检查出get请求的url？

Answer 1

你错过了一件事，如果你看看RestTemplateBuilder.rootUri(...)文档，他们将rootUri设置为任何请求的开头。/.但如果你没有添加它，它将忽略rootUri值。

因此，如果你只修改你的调用，它就会工作。

val resp = client.getForEntity(
                "/?userid=123456&password=1234356&method=TEST_MESSAGE", Response::class.java
            ) 

引用

更新。

var client: RestTemplate = builder.rootUri("http://foo.test.com/").build()

    fun sendMessage(request: Request) {

        println("here is the request")
        try {
            val resp = client.getForEntity(
                "/API/rest?userid=123456&password=1234356&method=TEST_MESSAGE", Response::class.java
            )
        } catch (e: Exception) {
            println("this is the error")
            e.printStackTrace()
        }
    }