How to duplicate a cURL command with file as body - go

Question

is there anyone can help me to converting this cURL command to Go?
curl -X PUT -H 'Content-Type: image/jpg' \
-H "Content-Length: 132093" \
-T "/Users/ikmal/Downloads/catcute.jpg" \
"https://hootsuite-video.s3.amazonaws.com/production/18395606_a9245dd7-73d6-4392-af4a-1cd9bf359cfb.jpg?AWSAccessKeyId=AKIAIM7ASX2JTE3ZFAAA&Expires=1543304067&Signature=n9sZkQ%2BF1DGuiYHqixrrvmoxIXQ%3D"
I already try generator like:
1. https://mholt.github.io/curl-to-go/
it created Go code like this:
// Generated by curl-to-Go: https://mholt.github.io/curl-to-go
req, err := http.NewRequest("PUT", "https://hootsuite-video.s3.amazonaws.com/production/18395606_a9245dd7-73d6-4392-af4a-1cd9bf359cfb.jpg?AWSAccessKeyId=AKIAIM7ASX2JTE3ZFAAA&Expires=1543304067&Signature=n9sZkQ%2BF1DGuiYHqixrrvmoxIXQ%3D", nil)
if err != nil {
// handle err
}
req.Header.Set("Content-Type", "image/jpg")
req.Header.Set("Content-Length", "132093")
resp, err := http.DefaultClient.Do(req)
if err != nil {
// handle err
}
defer resp.Body.Close()
2. https://curl.trillworks.com/
it created Go code like this:
package main
import (
"fmt"
"io/ioutil"
"log"
"net/http"
)
func main() {
client := &http.Client{}
req, err := http.NewRequest("PUT", "https://hootsuite-video.s3.amazonaws.com/production/18395606_a9245dd7-73d6-4392-af4a-1cd9bf359cfb.jpg?AWSAccessKeyId=AKIAIM7ASX2JTE3ZFAAA&Expires=1543304067&Signature=n9sZkQ%2BF1DGuiYHqixrrvmoxIXQ%3D", nil)
if err != nil {
log.Fatal(err)
}
req.Header.Set("Content-Type", "image/jpg")
req.Header.Set("Content-Length", "132093")
resp, err := client.Do(req)
if err != nil {
log.Fatal(err)
}
bodyText, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Fatal(err)
}
fmt.Printf("%s\n", bodyText)
}
But neither gives me proper code because when I run those on project, it returning some error, because it doesn't generate this part:
-T "/Users/ikmal/Downloads/catcute.jpg"
and generate it as "nil" instead.
UPDATE :
What I have done for this problem is adding this code:
file, err := os.Open("/Users/ikmal/Downloads/catcute.jpg")
if err != nil {
panic(err)
}
defer file.Close()
so I put the variable "file" into body request, here is my final code:
func main(){
file, err := os.Open("/Users/ikmal/Downloads/catcute.jpg")
if err != nil {
panic(err)
}
defer file.Close()
client := &http.Client{}
req, err := http.NewRequest("PUT", "https://hootsuite-video.s3.amazonaws.com/production/18395606_a9245dd7-73d6-4392-af4a-1cd9bf359cfb.jpg?AWSAccessKeyId=AKIAIM7ASX2JTE3ZFAAA&Expires=1543304067&Signature=n9sZkQ%2BF1DGuiYHqixrrvmoxIXQ%3D", file)
if err != nil {
log.Fatal(err)
}
req.Header.Set("Content-Type", "image/jpg")
req.Header.Set("Content-Length", "132093")
resp, err := client.Do(req)
if err != nil {
log.Fatal(err)
}
bodyText, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Fatal(err)
}
fmt.Printf("%s\n", bodyText)
}
then when I build and run this program, it returning response like this:
<?xml version="1.0" encoding="UTF-8"?>
<Error>
<Code>NotImplemented</Code>
<Message>A header you provided implies functionality that is not implemented</Message>
<Header>Transfer-Encoding</Header>
<RequestId>FBD2CEAF71EA4DEA</RequestId>
<HostId>K6hDrHIJr5YtoIBn2d64bfuLBgs6F17gKQV9jrTJ31X987A5gshhqtnKDs3lW2uSliBJwk1pri4=</HostId>
</Error>
It seems the error came from headers problem, but I'm sure I type the header correctly. Is there something wrong that I missed?

Answer 1

You must using multipart to upload content of image.
f, err := os.Open("./Users/ikmal/Downloads/catcute.jpg")
if err != nil{
log.Fatal(err)
}
defer f.Close()
var buf = new(bytes.Buffer)
writer := multipart.NewWriter(buf)
part, _ := writer.CreateFormFile("image", "dont care about name")
io.Copy(part, f)
writer.Close()
req, _ := http.NewRequest("POST", "https://hootsuite-video.s3.amazonaws.com/production/18395606_a9245dd7-73d6-4392-af4a-1cd9bf359cfb.jpg?AWSAccessKeyId=AKIAIM7ASX2JTE3ZFAAA&Expires=1543304067&Signature=n9sZkQ%2BF1DGuiYHqixrrvmoxIXQ%3D", buf)
req.Header.Set("Content-Type", writer.FormDataContentType())
client := &http.Client{}
res, _ := client.Do(req)
defer res.Body.Close()
b, _ := ioutil.ReadAll(res.Body)
fmt.Println(string(b))