CODEWITHSUNDEEP
httpgo
wong2
wong2

Reputation: 35700

How to set headers in http get request?

I'm doing a simple http GET in Go:

client := &http.Client{}
req, _ := http.NewRequest("GET", url, nil)
res, _ := client.Do(req)

But I can't found a way to customize the request header in the doc, thanks

Upvotes: 294

Views: 338544

Answers (4)

Sandeep
Sandeep

Reputation: 635

If you want to set more than one header, this can be handy rather than writing set statements.

client := http.Client{}
req , err := http.NewRequest("GET", url, nil)
if err != nil {
    //Handle Error
}

req.Header = http.Header{
    "Host": {"www.host.com"},
    "Content-Type": {"application/json"},
    "Authorization": {"Bearer Token"},
}

res , err := client.Do(req)
if err != nil {
    //Handle Error
}

Upvotes: 56

Oleg Neumyvakin
Oleg Neumyvakin

Reputation: 10272

Pay attention that in http.Request header "Host" can not be set via Set method

req.Header.Set("Host", "domain.tld")

but can be set directly:

req.Host = "domain.tld":

req, err := http.NewRequest("GET", "http://10.0.0.1/", nil)
if err != nil {
    ...
}

req.Host = "domain.tld"
client := &http.Client{}
resp, err := client.Do(req)

Upvotes: 93

Salvador Dali
Salvador Dali

Reputation: 222441

Go's net/http package has many functions that deal with headers. Among them are Add, Del, Get and Set methods. The way to use Set is:

func yourHandler(w http.ResponseWriter, r *http.Request) {
    w.Header().Set("header_name", "header_value")
}

Upvotes: -1

Denys Séguret
Denys Séguret

Reputation: 382092

The Header field of the Request is public. You may do this :

req.Header.Set("name", "value")

Upvotes: 400

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