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http_executor.go
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http_executor.go
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package executor
import (
"bytes"
"crypto/rand"
"crypto/tls"
"encoding/json"
"errors"
"fmt"
"io"
"mime/multipart"
"net/http"
"net/url"
"strings"
"time"
"github.com/UiPath/uipathcli/auth"
"github.com/UiPath/uipathcli/config"
"github.com/UiPath/uipathcli/log"
"github.com/UiPath/uipathcli/output"
"github.com/UiPath/uipathcli/utils"
)
const NotConfiguredErrorTemplate = `Run config command to set organization and tenant:
uipath config
For more information you can view the help:
uipath config --help
`
// The HttpExecutor implements the Executor interface and constructs HTTP request
// from the given command line parameters and configurations.
type HttpExecutor struct {
authenticators []auth.Authenticator
}
func (e HttpExecutor) Call(context ExecutionContext, writer output.OutputWriter, logger log.Logger) error {
return utils.Retry(func() error {
return e.call(context, writer, logger)
})
}
func (e HttpExecutor) requestId() string {
bytes := make([]byte, 16)
_, _ = rand.Read(bytes)
return fmt.Sprintf("%x%x%x%x%x", bytes[0:4], bytes[4:6], bytes[6:8], bytes[8:10], bytes[10:])
}
func (e HttpExecutor) addHeaders(request *http.Request, headerParameters []ExecutionParameter) {
formatter := newParameterFormatter()
request.Header.Add("x-request-id", e.requestId())
for _, parameter := range headerParameters {
headerValue := formatter.Format(parameter)
request.Header.Add(parameter.Name, headerValue)
}
}
func (e HttpExecutor) calculateMultipartSize(parameters []ExecutionParameter) int64 {
result := int64(0)
for _, parameter := range parameters {
switch v := parameter.Value.(type) {
case string:
result = result + int64(len(v))
case utils.Stream:
size, err := v.Size()
if err == nil {
result = result + size
}
}
}
return result
}
func (e HttpExecutor) writeMultipartForm(writer *multipart.Writer, parameters []ExecutionParameter) error {
for _, parameter := range parameters {
switch v := parameter.Value.(type) {
case string:
w, err := writer.CreateFormField(parameter.Name)
if err != nil {
return fmt.Errorf("Error creating form field '%s': %w", parameter.Name, err)
}
_, err = w.Write([]byte(v))
if err != nil {
return fmt.Errorf("Error writing form field '%s': %w", parameter.Name, err)
}
case utils.Stream:
w, err := writer.CreateFormFile(parameter.Name, v.Name())
if err != nil {
return fmt.Errorf("Error writing form file '%s': %w", parameter.Name, err)
}
data, err := v.Data()
if err != nil {
return err
}
defer data.Close()
_, err = io.Copy(w, data)
if err != nil {
return fmt.Errorf("Error writing form file '%s': %w", parameter.Name, err)
}
}
}
return nil
}
func (e HttpExecutor) serializeJson(body io.Writer, parameters []ExecutionParameter) error {
data := map[string]interface{}{}
for _, parameter := range parameters {
data[parameter.Name] = parameter.Value
}
result, err := json.Marshal(data)
if err != nil {
return fmt.Errorf("Error creating body: %w", err)
}
_, err = body.Write(result)
if err != nil {
return fmt.Errorf("Error writing body: %w", err)
}
return nil
}
func (e HttpExecutor) validateUri(uri string) (*url.URL, error) {
if strings.Contains(uri, "{organization}") {
return nil, fmt.Errorf("Missing organization parameter!\n\n%s", NotConfiguredErrorTemplate)
}
if strings.Contains(uri, "{tenant}") {
return nil, fmt.Errorf("Missing tenant parameter!\n\n%s", NotConfiguredErrorTemplate)
}
result, err := url.Parse(uri)
if err != nil {
return nil, fmt.Errorf("Invalid URI '%s': %w", uri, err)
}
return result, nil
}
func (e HttpExecutor) formatUri(baseUri url.URL, route string, pathParameters []ExecutionParameter, queryParameters []ExecutionParameter) (*url.URL, error) {
formatter := newUriFormatter(baseUri, route)
for _, parameter := range pathParameters {
formatter.FormatPath(parameter)
}
formatter.AddQueryString(queryParameters)
return e.validateUri(formatter.Uri())
}
func (e HttpExecutor) executeAuthenticators(authConfig config.AuthConfig, debug bool, insecure bool, request *http.Request) (*auth.AuthenticatorResult, error) {
authRequest := *auth.NewAuthenticatorRequest(request.URL.String(), map[string]string{})
ctx := *auth.NewAuthenticatorContext(authConfig.Type, authConfig.Config, debug, insecure, authRequest)
for _, authProvider := range e.authenticators {
result := authProvider.Auth(ctx)
if result.Error != "" {
return nil, errors.New(result.Error)
}
ctx.Config = result.Config
for k, v := range result.RequestHeader {
ctx.Request.Header[k] = v
}
}
return auth.AuthenticatorSuccess(ctx.Request.Header, ctx.Config), nil
}
func (e HttpExecutor) progressReader(text string, completedText string, reader io.Reader, length int64, progressBar *utils.ProgressBar) io.Reader {
if length < 10*1024*1024 {
return reader
}
progressReader := utils.NewProgressReader(reader, func(progress utils.Progress) {
displayText := text
if progress.Completed {
displayText = completedText
}
progressBar.Update(displayText, progress.BytesRead, length, progress.BytesPerSecond)
})
return progressReader
}
func (e HttpExecutor) writeMultipartBody(bodyWriter *io.PipeWriter, parameters []ExecutionParameter, errorChan chan error) (string, int64) {
contentLength := e.calculateMultipartSize(parameters)
formWriter := multipart.NewWriter(bodyWriter)
go func() {
defer bodyWriter.Close()
defer formWriter.Close()
err := e.writeMultipartForm(formWriter, parameters)
if err != nil {
errorChan <- err
return
}
}()
return formWriter.FormDataContentType(), contentLength
}
func (e HttpExecutor) writeInputBody(bodyWriter *io.PipeWriter, input utils.Stream, errorChan chan error) {
go func() {
defer bodyWriter.Close()
data, err := input.Data()
if err != nil {
errorChan <- err
return
}
defer data.Close()
_, err = io.Copy(bodyWriter, data)
if err != nil {
errorChan <- err
return
}
}()
}
func (e HttpExecutor) writeUrlEncodedBody(bodyWriter *io.PipeWriter, parameters []ExecutionParameter, errorChan chan error) {
go func() {
defer bodyWriter.Close()
formatter := newQueryStringFormatter()
queryString := formatter.Format(parameters)
_, err := bodyWriter.Write([]byte(queryString))
if err != nil {
errorChan <- err
return
}
}()
}
func (e HttpExecutor) writeJsonBody(bodyWriter *io.PipeWriter, parameters []ExecutionParameter, errorChan chan error) {
go func() {
defer bodyWriter.Close()
err := e.serializeJson(bodyWriter, parameters)
if err != nil {
errorChan <- err
return
}
}()
}
func (e HttpExecutor) writeBody(context ExecutionContext, errorChan chan error) (io.Reader, string, int64) {
if context.Input != nil {
reader, writer := io.Pipe()
e.writeInputBody(writer, context.Input, errorChan)
return reader, context.ContentType, -1
}
formParameters := context.Parameters.Form()
if len(formParameters) > 0 {
reader, writer := io.Pipe()
contentType, contentLength := e.writeMultipartBody(writer, formParameters, errorChan)
return reader, contentType, contentLength
}
bodyParameters := context.Parameters.Body()
if len(bodyParameters) > 0 && context.ContentType == "application/x-www-form-urlencoded" {
reader, writer := io.Pipe()
e.writeUrlEncodedBody(writer, bodyParameters, errorChan)
return reader, context.ContentType, -1
}
if len(bodyParameters) > 0 {
reader, writer := io.Pipe()
e.writeJsonBody(writer, bodyParameters, errorChan)
return reader, context.ContentType, -1
}
return bytes.NewReader([]byte{}), context.ContentType, -1
}
func (e HttpExecutor) send(client *http.Client, request *http.Request, errorChan chan error) (*http.Response, error) {
responseChan := make(chan *http.Response)
go func(client *http.Client, request *http.Request) {
response, err := client.Do(request)
if err != nil {
errorChan <- err
return
}
responseChan <- response
}(client, request)
select {
case err := <-errorChan:
return nil, err
case response := <-responseChan:
return response, nil
}
}
func (e HttpExecutor) logRequest(logger log.Logger, request *http.Request) {
buffer := &bytes.Buffer{}
_, _ = buffer.ReadFrom(request.Body)
body := buffer.Bytes()
request.Body = io.NopCloser(bytes.NewReader(body))
requestInfo := log.NewRequestInfo(request.Method, request.URL.String(), request.Proto, request.Header, bytes.NewReader(body))
logger.LogRequest(*requestInfo)
}
func (e HttpExecutor) logResponse(logger log.Logger, response *http.Response, body []byte) {
responseInfo := log.NewResponseInfo(response.StatusCode, response.Status, response.Proto, response.Header, bytes.NewReader(body))
logger.LogResponse(*responseInfo)
}
func (e HttpExecutor) pathParameters(context ExecutionContext) []ExecutionParameter {
pathParameters := context.Parameters.Path()
if context.Organization != "" {
pathParameters = append(pathParameters, *NewExecutionParameter("organization", context.Organization, "path"))
}
if context.Tenant != "" {
pathParameters = append(pathParameters, *NewExecutionParameter("tenant", context.Tenant, "path"))
}
return pathParameters
}
func (e HttpExecutor) call(context ExecutionContext, writer output.OutputWriter, logger log.Logger) error {
uri, err := e.formatUri(context.BaseUri, context.Route, e.pathParameters(context), context.Parameters.Query())
if err != nil {
return err
}
requestError := make(chan error)
bodyReader, contentType, contentLength := e.writeBody(context, requestError)
uploadBar := utils.NewProgressBar(logger)
uploadReader := e.progressReader("uploading...", "completing ", bodyReader, contentLength, uploadBar)
defer uploadBar.Remove()
request, err := http.NewRequest(context.Method, uri.String(), uploadReader)
if err != nil {
return fmt.Errorf("Error preparing request: %w", err)
}
if contentType != "" {
request.Header.Add("Content-Type", contentType)
}
e.addHeaders(request, context.Parameters.Header())
auth, err := e.executeAuthenticators(context.AuthConfig, context.Debug, context.Insecure, request)
if err != nil {
return err
}
for k, v := range auth.RequestHeader {
request.Header.Add(k, v)
}
transport := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: context.Insecure}, //nolint // This is user configurable and disabled by default
ResponseHeaderTimeout: 60 * time.Second,
}
client := &http.Client{Transport: transport}
if context.Debug {
e.logRequest(logger, request)
}
response, err := e.send(client, request, requestError)
if err != nil {
return utils.Retryable(fmt.Errorf("Error sending request: %w", err))
}
defer response.Body.Close()
downloadBar := utils.NewProgressBar(logger)
downloadReader := e.progressReader("downloading...", "completing ", response.Body, response.ContentLength, downloadBar)
defer downloadBar.Remove()
body, err := io.ReadAll(downloadReader)
if err != nil {
return utils.Retryable(fmt.Errorf("Error reading response body: %w", err))
}
e.logResponse(logger, response, body)
if response.StatusCode >= 500 {
return utils.Retryable(fmt.Errorf("Service returned status code '%v' and body '%v'", response.StatusCode, string(body)))
}
err = writer.WriteResponse(*output.NewResponseInfo(response.StatusCode, response.Status, response.Proto, response.Header, bytes.NewReader(body)))
if err != nil {
return err
}
return nil
}
func NewHttpExecutor(authenticators []auth.Authenticator) *HttpExecutor {
return &HttpExecutor{authenticators}
}