Golang Request.Files方法代码示例

func (c *client) Send(req cmds.Request) (cmds.Response, error) {

	if req.Context() == nil {
		log.Warningf("no context set in request")
		if err := req.SetRootContext(context.TODO()); err != nil {
			return nil, err
		}
	}

	// save user-provided encoding
	previousUserProvidedEncoding, found, err := req.Option(cmds.EncShort).String()
	if err != nil {
		return nil, err
	}

	// override with json to send to server
	req.SetOption(cmds.EncShort, cmds.JSON)

	// stream channel output
	req.SetOption(cmds.ChanOpt, "true")

	query, err := getQuery(req)
	if err != nil {
		return nil, err
	}

	var fileReader *MultiFileReader
	var reader io.Reader

	if req.Files() != nil {
		fileReader = NewMultiFileReader(req.Files(), true)
		reader = fileReader
	}

	path := strings.Join(req.Path(), "/")
	url := fmt.Sprintf(ApiUrlFormat, c.serverAddress, ApiPath, path, query)

	httpReq, err := http.NewRequest("POST", url, reader)
	if err != nil {
		return nil, err
	}

	// TODO extract string consts?
	if fileReader != nil {
		httpReq.Header.Set(contentTypeHeader, "multipart/form-data; boundary="+fileReader.Boundary())
		httpReq.Header.Set(contentDispHeader, "form-data: name=\"files\"")
	} else {
		httpReq.Header.Set(contentTypeHeader, applicationOctetStream)
	}
	httpReq.Header.Set(uaHeader, config.ApiVersion)

	ec := make(chan error, 1)
	rc := make(chan cmds.Response, 1)
	dc := req.Context().Done()

	go func() {
		httpRes, err := c.httpClient.Do(httpReq)
		if err != nil {
			ec <- err
			return
		}

		// using the overridden JSON encoding in request
		res, err := getResponse(httpRes, req)
		if err != nil {
			ec <- err
			return
		}

		rc <- res
	}()

	for {
		select {
		case <-dc:
			log.Debug("Context cancelled, cancelling HTTP request...")
			tr := http.DefaultTransport.(*http.Transport)
			tr.CancelRequest(httpReq)
			dc = nil // Wait for ec or rc
		case err := <-ec:
			return nil, err
		case res := <-rc:
			if found && len(previousUserProvidedEncoding) > 0 {
				// reset to user provided encoding after sending request
				// NB: if user has provided an encoding but it is the empty string,
				// still leave it as JSON.
				req.SetOption(cmds.EncShort, previousUserProvidedEncoding)
			}
			return res, nil
		}
	}
}

func (c *client) Send(req cmds.Request) (cmds.Response, error) {

	if req.Context() == nil {
		log.Warningf("no context set in request")
		if err := req.SetRootContext(context.TODO()); err != nil {
			return nil, err
		}
	}

	// save user-provided encoding
	previousUserProvidedEncoding, found, err := req.Option(cmds.EncShort).String()
	if err != nil {
		return nil, err
	}

	// override with json to send to server
	req.SetOption(cmds.EncShort, cmds.JSON)

	// stream channel output
	req.SetOption(cmds.ChanOpt, "true")

	query, err := getQuery(req)
	if err != nil {
		return nil, err
	}

	var fileReader *MultiFileReader
	var reader io.Reader

	if req.Files() != nil {
		fileReader = NewMultiFileReader(req.Files(), true)
		reader = fileReader
	}

	path := strings.Join(req.Path(), "/")
	url := fmt.Sprintf(ApiUrlFormat, c.serverAddress, ApiPath, path, query)

	httpReq, err := http.NewRequest("POST", url, reader)
	if err != nil {
		return nil, err
	}

	// TODO extract string consts?
	if fileReader != nil {
		httpReq.Header.Set(contentTypeHeader, "multipart/form-data; boundary="+fileReader.Boundary())
	} else {
		httpReq.Header.Set(contentTypeHeader, applicationOctetStream)
	}
	httpReq.Header.Set(uaHeader, config.ApiVersion)

	httpReq.Cancel = req.Context().Done()
	httpReq.Close = true

	httpRes, err := c.httpClient.Do(httpReq)
	if err != nil {
		return nil, err
	}

	// using the overridden JSON encoding in request
	res, err := getResponse(httpRes, req)
	if err != nil {
		return nil, err
	}

	if found && len(previousUserProvidedEncoding) > 0 {
		// reset to user provided encoding after sending request
		// NB: if user has provided an encoding but it is the empty string,
		// still leave it as JSON.
		req.SetOption(cmds.EncShort, previousUserProvidedEncoding)
	}

	return res, nil
}

func (c *client) Send(req cmds.Request) (cmds.Response, error) {

	// save user-provided encoding
	previousUserProvidedEncoding, found, err := req.Option(cmds.EncShort).String()
	if err != nil {
		return nil, err
	}

	// override with json to send to server
	req.SetOption(cmds.EncShort, cmds.JSON)

	// stream channel output
	req.SetOption(cmds.ChanOpt, "true")

	query, err := getQuery(req)
	if err != nil {
		return nil, err
	}

	var fileReader *MultiFileReader
	var reader io.Reader

	if req.Files() != nil {
		fileReader = NewMultiFileReader(req.Files(), true)
		reader = fileReader
	} else {
		// if we have no file data, use an empty Reader
		// (http.NewRequest panics when a nil Reader is used)
		reader = strings.NewReader("")
	}

	path := strings.Join(req.Path(), "/")
	url := fmt.Sprintf(ApiUrlFormat, c.serverAddress, ApiPath, path, query)

	httpReq, err := http.NewRequest("POST", url, reader)
	if err != nil {
		return nil, err
	}

	// TODO extract string consts?
	if fileReader != nil {
		httpReq.Header.Set("Content-Type", "multipart/form-data; boundary="+fileReader.Boundary())
		httpReq.Header.Set("Content-Disposition", "form-data: name=\"files\"")
	} else {
		httpReq.Header.Set("Content-Type", "application/octet-stream")
	}
	version := config.CurrentVersionNumber
	httpReq.Header.Set("User-Agent", fmt.Sprintf("/go-ipfs/%s/", version))

	ec := make(chan error, 1)
	rc := make(chan cmds.Response, 1)
	dc := req.Context().Context.Done()

	go func() {
		httpRes, err := http.DefaultClient.Do(httpReq)
		if err != nil {
			ec <- err
			return
		}
		// using the overridden JSON encoding in request
		res, err := getResponse(httpRes, req)
		if err != nil {
			ec <- err
			return
		}
		rc <- res
	}()

	for {
		select {
		case <-dc:
			log.Debug("Context cancelled, cancelling HTTP request...")
			tr := http.DefaultTransport.(*http.Transport)
			tr.CancelRequest(httpReq)
			dc = nil // Wait for ec or rc
		case err := <-ec:
			return nil, err
		case res := <-rc:
			if found && len(previousUserProvidedEncoding) > 0 {
				// reset to user provided encoding after sending request
				// NB: if user has provided an encoding but it is the empty string,
				// still leave it as JSON.
				req.SetOption(cmds.EncShort, previousUserProvidedEncoding)
			}
			return res, nil
		}
	}
}