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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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