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All rights reserved.\n// Licensed to the Readium Foundation under one or more contributor license agreements.\n// Use of this source code is governed by a BSD-style license\n// that can be found in the LICENSE file exposed on Github (readium) in the project repository.\n// ==LICENSE-END==\n\nimport * as debug_ from \"debug\";\nimport * as request from \"request\";\nimport * as requestPromise from \"request-promise-native\";\nimport { Readable } from \"stream\";\n\nimport { streamToBufferPromise } from \"../stream/BufferUtils\";\n\n/////////////\n/////////////\n/////////////\n///////////// THIS IS UNUSED CODE!\n/////////////\n/////////////\n/////////////\n\nconst debug = debug_(\"r2:utils#http/HttpReadableStream\");\n\nexport class HttpReadableStream extends Readable {\n\n private alreadyRead = 0;\n\n constructor(\n readonly url: string,\n readonly byteLength: number,\n readonly byteStart: number,\n readonly byteEnd: number) {\n super();\n }\n\n public _read(_size: number) {\n\n const length = this.byteEnd - this.byteStart;\n // debug(`_read: ${size} (${this.url}` +\n // ` content-length=${this.byteLength} start=${this.start} end+1=${this.end} (length=${length}))`);\n // debug(`alreadyRead: ${this.alreadyRead} (byteLength: ${length})`);\n if (this.alreadyRead >= length) {\n // debug(\"this.alreadyRead >= this.byteLength\");\n this.push(null);\n return;\n }\n\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n const failure = (err: any) => {\n debug(err);\n this.push(null);\n };\n\n const success = async (res: request.RequestResponse) => {\n if (res.statusCode && (res.statusCode < 200 || res.statusCode >= 300)) {\n failure(\"HTTP CODE \" + res.statusCode);\n return;\n }\n\n // debug(res.headers);\n // debug(res.headers[\"content-type\"]);\n // debug(`HTTP response content-range: ${res.headers[\"content-range\"]}`);\n // debug(`HTTP response content-length: ${res.headers[\"content-length\"]}`);\n\n let buffer: Buffer;\n try {\n buffer = await streamToBufferPromise(res);\n } catch (err) {\n failure(err);\n return;\n }\n\n // debug(`streamToBufferPromise: ${buffer.length}`);\n this.alreadyRead += buffer.length;\n this.push(buffer);\n };\n\n debug(`HTTP GET ${this.url}: ${this.byteStart}-${this.byteEnd} (${this.byteEnd - this.byteStart})`);\n\n const lastByteIndex = this.byteEnd - 1;\n const range = `${this.byteStart}-${lastByteIndex}`;\n\n // No response streaming! :(\n // https://github.com/request/request-promise/issues/90\n const needsStreamingResponse = true;\n if (needsStreamingResponse) {\n request.get({\n headers: { Range: `bytes=${range}` },\n method: \"GET\",\n uri: this.url,\n })\n .on(\"response\", async (res) => {\n try {\n await success(res);\n }\n catch (successError) {\n failure(successError);\n return;\n }\n })\n .on(\"error\", failure);\n } else {\n (async () => {\n let res: requestPromise.FullResponse;\n try {\n // tslint:disable-next-line:await-promise no-floating-promises\n res = await requestPromise({\n headers: { Range: `bytes=${range}` },\n method: \"GET\",\n resolveWithFullResponse: true,\n uri: this.url,\n });\n } catch (err) {\n failure(err);\n return;\n }\n\n await success(res);\n })();\n }\n }\n}\n"]} |