使用 RestTemplate 的 Http Get 请求 - org.springframework.web.client.ResourceAccessException

Http Get request with RestTemplate - org.springframework.web.client.ResourceAccessException

我在下面的代码中使用 RestTemplate 发出 GET 请求。如果我直接从 chrome/postman 调用它,请求工作正常。但是,它不适用于代码。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()
        }
    }

}

这是我遇到的异常。

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

完整跟踪 http://collabedit.com/t6h2f

感谢任何帮助。提前致谢。

编辑- 有什么方法可以 check/print 来自 restTemplate 的 url 吗?

您错过了一件事,如果您查看 RestTemplateBuilder.rootUri(..) 文档,他们会将 rootUri 设置为以 / 开头的任何请求。但是如果你没有添加它,它会忽略 rootUri 值。

因此,如果您只更改对此的调用,它将起作用:

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

Reference

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()
        }
    }