执行如下get url
resp, err := http.Get(path)
事先，我打印了path变量，它或多或少像这样
http://localhost:8080/api/history/resources/count?startedAfter="2021-03-06T15%3A27%3A13.894415787%2B0200"
当我点击链接时，它确实返回200和有效的json响应。
但是代码本身失败并打印:
<!doctype html><html lang="en"><head><title>HTTP Status 400 – Bad Request</title>Invalid character found in the request target [/api/history/resources/count?startedAfter="2021-03-06T15%3A27%3A13.894415787%2B0200"]. The valid characters are defined in RFC 7230 and RFC 3986</p><p><b>Description</b> The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).</p><p><b>Exception</b></p><pre>java.lang.IllegalArgumentException: Invalid character found in the request target [/apit/history/resources/count?startedAfter="2021-03-06T15%3A27%3A13.894415787%2B0200"]. The valid characters are defined in RFC 7230 and RFC 3986
org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:491)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:260)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.base/java.lang.Thread.run(Thread.java:834)
</pre><p><b>Note</b> The full stack trace of the root cause is available in the server logs.</p><hr class="line" /><h3>Apache Tomcat/9.0.36</h3></body></html>
为什么?
查询参数中的引号似乎正在导致服务器上的错误。试试这样写
apiURL := "http://localhost:8080/api/history/resources/count"
req, err := http.NewRequest("GET", apiURL, nil)
if err != nil {
log.Fatal(err)
}
apiParams := req.URL.Query()
apiParams.Add("startedAfter", "2021-03-06T15:27:13.894415787+0200")
req.URL.RawQuery = apiParams.Encode()
res, err := http.DefaultClient.Do(req)
试一下，然后恢复。