CODEWITHSUNDEEP
go
user3761308
user3761308

Reputation: 791

Go - httpRequest.Write(), pass a long request to a Writer without being cut off?

Creating a request, then writing it

var w CustomWriter

req, _ := http.NewRequest("POST", "/Foo", bytes.NewReader([]byte(<very long string>)))
req.Write(w)

func (w *CustomWriter) Write(request []byte) (int, error) {
    fmt.Println(len(request))

    return 0, nil
}

Output: 4096

But the body of my request is noticeably longer, but it just gets cut off when trying to write it. How do I write and send this HTTP Request that has a very long body without the body being lost or cut off?

Upvotes: 0

Views: 2707

Answers (2)

Rob
Rob

Reputation: 1437

If you are ok with the request being turned into a huge array, this is already part of the Go stdlib:

import "net/http/httputil"

...
    rData, err := httputil.DumpRequest(r, true)
...


...

func debugResponse(resp *http.Response) {
    dump, _ := httputil.DumpResponse(resp, true)
    fmt.Println("DEBUG:")
    fmt.Printf("%q", dump)
}

Once you consume the response or request, you have to assume that it has been held in memory. Use the flag false if you don't want to print the body because it's large or binary.

Upvotes: 1

Franck Jeannin
Franck Jeannin

Reputation: 6844

This is not how you execute HTTP requests in Go. You need to do

req, _ := http.NewRequest("POST", "/Foo", bytes.NewReader([]byte(<very long string>)))
client := &http.Client{}
resp, err := client.Do(req)

Upvotes: 2

Related Questions