Golang http request specify host in POST path

Question

I'm performing the following request in golang:

request := &http.Request{
        URL:           url,
        Body:          requestBody, //io.ReadCloser containing the body
        Method:        http.MethodPost,
        ContentLength: int64(len(postBody)),
        Header:        make(http.Header),
        Proto:         "HTTP/1.1",
        ProtoMajor:    1,
        ProtoMinor:    1,
    }

res, err := http.DefaultClient.Do(request)

//Printing the request:
dump, dumpErr := httputil.DumpRequest(request, true)
if dumpErr != nil {
   log.Fatal("Cannot dump the request")
}
log.Println(string(dump))

I want the host to be specified also in the path of the post request. Is it possible?

Expected result:

POST "http://127.0.0.1:10019/system?action=add_servers" HTTP/1.1
Host: 127.0.0.1:10019
Accept: "*/*"
Connection: keep-alive

Actual result:

POST "/system?action=add_servers" HTTP/1.1
Host: 127.0.0.1:10019
Accept: "*/*"
Connection: keep-alive

score 2 · Accepted Answer · 2021-06-28 14:41:15Z

Set the Request.URL to an opaque URL. The opaque URL is written to the request line as is.

request := &http.Request{
        URL:           &url.URL{Opaque: "http://127.0.0.1:10019/system?action=add_servers"}
        Body:          requestBody, //io.ReadCloser containing the body
        Method:        http.MethodPost,
        ContentLength: int64(len(postBody)),
        Header:        make(http.Header),
        Proto:         "HTTP/1.1",
        ProtoMajor:    1,
        ProtoMinor:    1,
    }

The http.NewRequest and http.NewRequestContext functions are the preferred way to create a request value. Set Request.URL to the opaque URL after creating the request with one of these functions:

u := "http://127.0.0.1:10019/system?action=add_servers"
request, err := http.NewRequest("POST", u, requestBody)
if err != nil {
    // handle error
}
request.URL = &url.URL{Opaque: u}

res, err := http.DefaultClient.Do(request)

Muh faris · Accepted Answer · 2021-06-28 09:14:10Z

0

what value of the URL variable? I think you can define the URL variable use a specific host

var url = "http://127.0.0.1:10019/system?action=add_servers"

In case your path is dynamic from another variable, you can use fmt.Sprintf, like below

// assume url value
var path = "/system?action=add_servers" 
url = fmt.Sprintf("http://127.0.0.1:10019/%s", path)

answered Jun 28, 2021 at 9:14

Muh faris

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1 Comment

icza Over a year ago

The question is not about the path / URL to post to, it's about the URL in the POST line of the HTTP protocol.

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