如何在Go中使用承载令牌提出请求

Question

I need to make a GET request to an API with a bearer token in the authorization request. How can I do this in Go? I have the following code, but I haven't had success.

package main

import (
    "io/ioutil"
    "log"
    "net/http"
)

func main() {
    url := "https://api.globalcode.com.br/v1/publico/eventos"

    resp, err := http.Get(url)
    resp.Header.Add("Bearer", "token")
    if err != nil {
        log.Println("Erro ao realizar request.
[ERRO] -", err)
    }

    body, _ := ioutil.ReadAll(resp.Body)
    log.Println(string([]byte(body)))
}

Answer 1

For control over HTTP client headers, redirect policy, and other settings, create a Client:

package main

import (
    "io/ioutil"
    "log"
    "net/http"
)

func main() {
    url := "https://api.globalcode.com.br/v1/publico/eventos"

    // Create a Bearer string by appending string access token
    var bearer = "Bearer " + <ACCESS TOKEN HERE>

    // Create a new request using http
    req, err := http.NewRequest("GET", url, nil)

    // add authorization header to the req
    req.Header.Add("Authorization", bearer)

    // Send req using http Client
    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        log.Println("Error on response.
[ERRO] -", err)
    }

    body, _ := ioutil.ReadAll(resp.Body)
    log.Println(string([]byte(body)))
}

The Client's Transport typically has internal state (cached TCP connections), so Clients should be reused instead of created as needed. Clients are safe for concurrent use by multiple goroutines.

A Client is higher-level than a RoundTripper (such as Transport) and additionally handles HTTP details such as cookies and redirects.

For more information on Client and Transport check golang spec for net/http package