xhrHttpClient.js.map

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Copyright (c) Microsoft Corporation.\n// Licensed under the MIT license.\n\nimport { HttpHeaders, HttpHeadersLike } from \"./httpHeaders\";\nimport { TransferProgressEvent, WebResourceLike } from \"./webResource\";\nimport { AbortError } from \"@azure/abort-controller\";\nimport { HttpClient } from \"./httpClient\";\nimport { HttpOperationResponse } from \"./httpOperationResponse\";\nimport { RestError } from \"./restError\";\n\n/**\n * A HttpClient implementation that uses XMLHttpRequest to send HTTP requests.\n */\nexport class XhrHttpClient implements HttpClient {\n  public sendRequest(request: WebResourceLike): Promise<HttpOperationResponse> {\n    const xhr = new XMLHttpRequest();\n\n    if (request.proxySettings) {\n      throw new Error(\"HTTP proxy is not supported in browser environment\");\n    }\n\n    const abortSignal = request.abortSignal;\n    if (abortSignal) {\n      if (abortSignal.aborted) {\n        return Promise.reject(new AbortError(\"The operation was aborted.\"));\n      }\n\n      const listener = (): void => {\n        xhr.abort();\n      };\n      abortSignal.addEventListener(\"abort\", listener);\n      xhr.addEventListener(\"readystatechange\", () => {\n        if (xhr.readyState === XMLHttpRequest.DONE) {\n          abortSignal.removeEventListener(\"abort\", listener);\n        }\n      });\n    }\n\n    addProgressListener(xhr.upload, request.onUploadProgress);\n    addProgressListener(xhr, request.onDownloadProgress);\n\n    if (request.formData) {\n      const formData = request.formData;\n      const requestForm = new FormData();\n      const appendFormValue = (key: string, value: any): void => {\n        if (\n          value &&\n          Object.prototype.hasOwnProperty.call(value, \"value\") &&\n          Object.prototype.hasOwnProperty.call(value, \"options\")\n        ) {\n          requestForm.append(key, value.value, value.options);\n        } else {\n          requestForm.append(key, value);\n        }\n      };\n      for (const formKey of Object.keys(formData)) {\n        const formValue = formData[formKey];\n        if (Array.isArray(formValue)) {\n          for (let j = 0; j < formValue.length; j++) {\n            appendFormValue(formKey, formValue[j]);\n          }\n        } else {\n          appendFormValue(formKey, formValue);\n        }\n      }\n\n      request.body = requestForm;\n      request.formData = undefined;\n      const contentType = request.headers.get(\"Content-Type\");\n      if (contentType && contentType.indexOf(\"multipart/form-data\") !== -1) {\n        // browser will automatically apply a suitable content-type header\n        request.headers.remove(\"Content-Type\");\n      }\n    }\n\n    xhr.open(request.method, request.url);\n    xhr.timeout = request.timeout;\n    xhr.withCredentials = request.withCredentials;\n    for (const header of request.headers.headersArray()) {\n      xhr.setRequestHeader(header.name, header.value);\n    }\n\n    xhr.responseType =\n      request.streamResponseStatusCodes?.size || request.streamResponseBody ? \"blob\" : \"text\";\n\n    // tslint:disable-next-line:no-null-keyword\n    xhr.send(request.body === undefined ? null : request.body);\n\n    if (xhr.responseType === \"blob\") {\n      return new Promise((resolve, reject) => {\n        handleBlobResponse(xhr, request, resolve, reject);\n        rejectOnTerminalEvent(request, xhr, reject);\n      });\n    } else {\n      return new Promise(function (resolve, reject) {\n        xhr.addEventListener(\"load\", () =>\n          resolve({\n            request,\n            status: xhr.status,\n            headers: parseHeaders(xhr),\n            bodyAsText: xhr.responseText,\n          })\n        );\n        rejectOnTerminalEvent(request, xhr, reject);\n      });\n    }\n  }\n}\n\nfunction handleBlobResponse(\n  xhr: XMLHttpRequest,\n  request: WebResourceLike,\n  res: (value: HttpOperationResponse | PromiseLike<HttpOperationResponse>) => void,\n  rej: (reason?: any) => void\n): void {\n  xhr.addEventListener(\"readystatechange\", () => {\n    // Resolve as soon as headers are loaded\n    if (xhr.readyState === XMLHttpRequest.HEADERS_RECEIVED) {\n      if (request.streamResponseBody || request.streamResponseStatusCodes?.has(xhr.status)) {\n        const blobBody = new Promise<Blob>((resolve, reject) => {\n          xhr.addEventListener(\"load\", () => {\n            resolve(xhr.response);\n          });\n          rejectOnTerminalEvent(request, xhr, reject);\n        });\n        res({\n          request,\n          status: xhr.status,\n          headers: parseHeaders(xhr),\n          blobBody,\n        });\n      } else {\n        xhr.addEventListener(\"load\", () => {\n          // xhr.response is of Blob type if the request is sent with xhr.responseType === \"blob\"\n          // but the status code is not one of the stream response status codes,\n          // so treat it as text and convert from Blob to text\n          if (xhr.response) {\n            // Blob.text() is not supported in IE so using FileReader instead\n            const reader = new FileReader();\n            reader.onload = function (e) {\n              const text = e.target?.result as string;\n              res({\n                request,\n                status: xhr.status,\n                headers: parseHeaders(xhr),\n                bodyAsText: text,\n              });\n            };\n            reader.onerror = function (_e) {\n              rej(reader.error);\n            };\n            reader.readAsText(xhr.response, \"UTF-8\");\n          } else {\n            res({\n              request,\n              status: xhr.status,\n              headers: parseHeaders(xhr),\n            });\n          }\n        });\n      }\n    }\n  });\n}\n\nfunction addProgressListener(\n  xhr: XMLHttpRequestEventTarget,\n  listener?: (progress: TransferProgressEvent) => void\n): void {\n  if (listener) {\n    xhr.addEventListener(\"progress\", (rawEvent) =>\n      listener({\n        loadedBytes: rawEvent.loaded,\n      })\n    );\n  }\n}\n\n// exported locally for testing\nexport function parseHeaders(xhr: XMLHttpRequest): HttpHeadersLike {\n  const responseHeaders = new HttpHeaders();\n  const headerLines = xhr\n    .getAllResponseHeaders()\n    .trim()\n    .split(/[\\r\\n]+/);\n  for (const line of headerLines) {\n    const index = line.indexOf(\":\");\n    const headerName = line.slice(0, index);\n    const headerValue = line.slice(index + 2);\n    responseHeaders.set(headerName, headerValue);\n  }\n  return responseHeaders;\n}\n\nfunction rejectOnTerminalEvent(\n  request: WebResourceLike,\n  xhr: XMLHttpRequest,\n  reject: (err: any) => void\n): void {\n  xhr.addEventListener(\"error\", () =>\n    reject(\n      new RestError(\n        `Failed to send request to ${request.url}`,\n        RestError.REQUEST_SEND_ERROR,\n        undefined,\n        request\n      )\n    )\n  );\n  const abortError = new AbortError(\"The operation was aborted.\");\n  xhr.addEventListener(\"abort\", () => reject(abortError));\n  xhr.addEventListener(\"timeout\", () => reject(abortError));\n}\n"]}