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从 golang 代码将文件发送到 Google Drive API 会产生错误:类型不支持的内容:image/jpeg
来源:stackoverflow
2024-04-20 11:06:35
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问题内容
根据 google drive api 文档,上传文件的正确方法是:
curl -v -h '授权:不记名 mytoken' -f 'metadata={"name": "test3.jpeg"};type=application/json' -f file=@jpeg_image.jpeg 'https:// www.googleapis.com/upload/drive/v3/files?uploadtype=multipart'
现在,我需要从 golang 代码执行相同的请求,但我很难将其转换为 golang,这是我经过多次尝试后使用的代码:
// filebytes are of type []byte
buffer := &bytes.buffer{}
multipartwriter := multipart.newwriter(buffer)
multipartwriter.writefield("metadata", "{\"name\": \"test3.jpef\"};type=application/json")
partheader := textproto.mimeheader{}
partheader.add("content-type", "image/jpeg")
filepartwriter, _ := multipartwriter.createpart(partheader)
io.copy(filepartwriter, bytes.newreader(filebytes))
multipartwriter.close()
googledriverequest, _ := http.newrequest(http.methodpost, "https://www.googleapis.com/upload/drive/v3/files?uploadtype=multipart", buffer)
googledriverequest.header.add("authorization", "bearer "+accesstoken)
googledriverequest.header.add("content-type", multipartwriter.formdatacontenttype())
googledriveapiresponse, googledriveapierror := lib.httpclient.do(googledriverequest)
使用curl请求成功:
{
"kind": "drive#file",
"id": "1dwsbqgp3-qts5p0iqqrtajcccsafxzgd",
"name": "test3.jpeg",
"mimetype": "image/jpeg"
}
使用 golang,我得到 400:
{\n \"error\": {\n \"errors\": [\n {\n \"domain\": \"global\",\n \"reason\": \"badContent\",\n \"message\": \"Unsupported content with type: image/jpeg \"\n }\n ],\n \"code\": 400,\n \"message\": \"Unsupported content with type: image/jpeg\"\n }\n}\n
我还尝试了 partheader.add("content-type", "image/jpeg") 的不同值,我也尝试了 application/x-www-form-urlencoded ,我还注释掉了这一行,并让 golang 进行检测,但仍然出现相同的错误。
有什么建议或想法吗?
问候,
解决方案
问题出在您发送的 json 元数据中。这是一个可以工作的示例代码(使用适当的错误检查),
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"log"
"mime/multipart"
"net/http"
"net/textproto"
)
func main() {
accessToken := "YOUR-TOKEN"
client := http.Client{}
mediaData, _ := ioutil.ReadFile("test.png")
body := &bytes.Buffer{}
writer := multipart.NewWriter(body)
// JSON Metadata (part-1)
jsonMetadata := textproto.MIMEHeader{}
metadata := `{"name": "test.png"}`
jsonMetadata.Set("Content-Type", "application/json")
part, _ := writer.CreatePart(jsonMetadata)
part.Write([]byte(metadata))
// Image bytes (part-2)
imageData := textproto.MIMEHeader{}
partAttach, _ := writer.CreatePart(imageData)
io.Copy(partAttach, bytes.NewReader(mediaData))
writer.Close()
// Request Content Type with boundary
contentType := fmt.Sprintf("multipart/related; boundary=%s", writer.Boundary())
// HTTP Request with auth and content type headers
req, _ := http.NewRequest(http.MethodPost, "https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart", bytes.NewReader(body.Bytes()))
req.Header.Add("Authorization", "Bearer "+accessToken)
req.Header.Add("Content-Type", contentType)
// Send request
resp, err := client.Do(req)
if err != nil {
log.Fatalf("failed to send request: %v", err)
}
defer resp.Body.Close()
content, _ := ioutil.ReadAll(resp.Body)
log.Printf("http status: %d", resp.StatusCode)
log.Printf("response: %s", string(content))
}
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