Golang Request.SetRootContext方法代码示例

func callCommand(ctx context.Context, req cmds.Request, root *cmds.Command, cmd *cmds.Command) (cmds.Response, error) {
	log.Info(config.EnvDir, " ", req.InvocContext().ConfigRoot)
	var res cmds.Response

	err := req.SetRootContext(ctx)
	if err != nil {
		return nil, err
	}

	details, err := commandDetails(req.Path(), root)
	if err != nil {
		return nil, err
	}

	client, err := commandShouldRunOnDaemon(*details, req, root)
	if err != nil {
		return nil, err
	}

	err = callPreCommandHooks(ctx, *details, req, root)
	if err != nil {
		return nil, err
	}

	if cmd.PreRun != nil {
		err = cmd.PreRun(req)
		if err != nil {
			return nil, err
		}
	}

	if client != nil && !cmd.External {
		log.Debug("Executing command via API")
		res, err = client.Send(req)
		if err != nil {
			if isConnRefused(err) {
				err = repo.ErrApiNotRunning
			}
			return nil, err
		}

	} else {
		log.Debug("Executing command locally")

		err := req.SetRootContext(ctx)
		if err != nil {
			return nil, err
		}

		// Okay!!!!! NOW we can call the command.
		res = root.Call(req)

	}

	if cmd.PostRun != nil {
		cmd.PostRun(req, res)
	}

	return res, nil
}

func callCommand(ctx context.Context, req cmds.Request, root *cmds.Command, cmd *cmds.Command) (cmds.Response, error) {
	log.Info(config.EnvDir, " ", req.InvocContext().ConfigRoot)
	var res cmds.Response

	err := req.SetRootContext(ctx)
	if err != nil {
		return nil, err
	}

	details, err := commandDetails(req.Path(), root)
	if err != nil {
		return nil, err
	}

	log.Debug("looking for running daemon...")
	useDaemon, err := commandShouldRunOnDaemon(*details, req, root)
	if err != nil {
		return nil, err
	}

	err = callPreCommandHooks(ctx, *details, req, root)
	if err != nil {
		return nil, err
	}

	if cmd.PreRun != nil {
		err = cmd.PreRun(req)
		if err != nil {
			return nil, err
		}
	}

	if useDaemon {

		cfg, err := req.InvocContext().GetConfig()
		if err != nil {
			return nil, err
		}

		addr, err := ma.NewMultiaddr(cfg.Addresses.API)
		if err != nil {
			return nil, err
		}

		log.Infof("Executing command on daemon running at %s", addr)
		_, host, err := manet.DialArgs(addr)
		if err != nil {
			return nil, err
		}

		client := cmdsHttp.NewClient(host)

		res, err = client.Send(req)
		if err != nil {
			return nil, err
		}

	} else {
		log.Debug("Executing command locally")

		err := req.SetRootContext(ctx)
		if err != nil {
			return nil, err
		}

		// Okay!!!!! NOW we can call the command.
		res = root.Call(req)

	}

	if cmd.PostRun != nil {
		cmd.PostRun(req, res)
	}

	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) {

	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
		}
	}
}