为什么 RestTemplate 忽略 rootUri

Question

我有以下 Groovy 代码：

def test(){
    RequestEntity request=RequestEntity.method(HttpMethod.GET,new URI("/some/resource"))
        .accept("text/plain")
        .build()

    def template=new RestTemplateBuilder()
        .rootUri("http://example.com/api")
        .build()
    def response=template.exchange(request,String)
    assert response.statusCode.value()==200
}

它返回如下内容：

org.springframework.web.client.ResourceAccessException: I/O error on GET request for "/some/resource": null; nested exception is org.apache.http.client.ClientProtocolException
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:666)
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:628)
    at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:590)
    …
Caused by: org.apache.http.client.ClientProtocolException
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:187)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56)
    at org.springframework.http.client.HttpComponentsClientHttpRequest.executeInternal(HttpComponentsClientHttpRequest.java:89)
    at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
    …
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)
... 15 more

看起来 rootUri 被 RestTemplateBuilder 忽略了。有没有办法让所有以“/”开头的请求添加“ http://example.com/api ”？

Answer 1

有类似的问题。通过改变解决它

restTemplate.postForEntity(URI.create("/foo", request, SomeClass.class)

到

restTemplate.postForEntity("/foo", request, SomeClass.class)

所以基本上，尝试将路径指定为字符串而不是 URI。之后才应该尊重rootUri。希望这可以帮助。

此处解释的行为：https : //github.com/spring-projects/spring-boot/issues/7891