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==LICENSE-BEGIN==\n// Copyright 2017 European Digital Reading Lab. 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 express from \"express\";\nimport * as mime from \"mime-types\";\nimport * as path from \"path\";\n\nimport { zipHasEntry } from \"@r2-shared-js/_utils/zipHasEntry\";\nimport { Publication } from \"@r2-shared-js/models/publication\";\nimport { Link } from \"@r2-shared-js/models/publication-link\";\nimport { Transformers } from \"@r2-shared-js/transform/transformer\";\nimport { parseRangeHeader } from \"@r2-utils-js/_utils/http/RangeUtils\";\nimport { streamToBufferPromise } from \"@r2-utils-js/_utils/stream/BufferUtils\";\nimport { IStreamAndLength, IZip } from \"@r2-utils-js/_utils/zip/zip\";\n\nimport {\n IRequestPayloadExtension, IRequestQueryParams, URL_PARAM_SESSION_INFO, _asset, _pathBase64,\n} from \"./request-ext\";\nimport { Server } from \"./server\";\n\n// import { CounterPassThroughStream } from \"@r2-utils-js/_utils/stream/CounterPassThroughStream\";\n// import { PassThrough } from \"stream\";\n\nconst debug = debug_(\"r2:streamer#http/server-assets\");\n\nexport function serverAssets(server: Server, routerPathBase64: express.Router) {\n\n // let streamCounter = 0;\n\n const routerAssets = express.Router({ strict: false });\n // routerAssets.use(morgan(\"combined\"), { stream: { write: (msg: any) => debug(msg) } }));\n\n routerAssets.get(\"/\",\n async (req: express.Request, res: express.Response) => {\n\n const reqparams = (req as IRequestPayloadExtension).params;\n\n if (!reqparams.pathBase64) {\n reqparams.pathBase64 = (req as IRequestPayloadExtension).pathBase64;\n }\n if (!reqparams.asset) {\n reqparams.asset = (req as IRequestPayloadExtension).asset;\n }\n if (!reqparams.lcpPass64) {\n reqparams.lcpPass64 = (req as IRequestPayloadExtension).lcpPass64;\n }\n\n const isShow = (req.query as IRequestQueryParams).show;\n\n // debug(req.method);\n const isHead = req.method.toLowerCase() === \"head\";\n if (isHead) {\n debug(\"HEAD !!!!!!!!!!!!!!!!!!!\");\n }\n\n // reqparams.pathBase64 is already decoded!\n // const decoded = decodeURIComponent(reqparams.pathBase64);\n const pathBase64Str = Buffer.from(reqparams.pathBase64, \"base64\").toString(\"utf8\");\n\n // const fileName = path.basename(pathBase64Str);\n // const ext = path.extname(fileName).toLowerCase();\n\n let publication: Publication;\n try {\n publication = await server.loadOrGetCachedPublication(pathBase64Str);\n } catch (err) {\n debug(err);\n res.status(500).send(\"<html><body><p>Internal Server Error</p><p>\"\n + err + \"</p></body></html>\");\n return;\n }\n\n // dumpPublication(publication);\n\n const zipInternal = publication.findFromInternal(\"zip\");\n if (!zipInternal) {\n const err = \"No publication zip!\";\n debug(err);\n res.status(500).send(\"<html><body><p>Internal Server Error</p><p>\"\n + err + \"</p></body></html>\");\n return;\n }\n const zip = zipInternal.Value as IZip;\n\n const pathInZip = reqparams.asset;\n\n if (!zipHasEntry(zip, pathInZip, undefined)) {\n const err = \"Asset not in zip! \" + pathInZip;\n debug(err);\n res.status(500).send(\"<html><body><p>Internal Server Error</p><p>\"\n + err + \"</p></body></html>\");\n return;\n }\n\n const isDivina = publication.Metadata && publication.Metadata.RDFType &&\n (/http[s]?:\\/\\/schema\\.org\\/ComicStory$/.test(publication.Metadata.RDFType) ||\n /http[s]?:\\/\\/schema\\.org\\/VisualNarrative$/.test(publication.Metadata.RDFType));\n\n let link: Link | undefined;\n\n const findLinkRecursive = (relativePath: string, l: Link): Link | undefined => {\n if (l.Href === relativePath) {\n return l;\n }\n let found: Link | undefined;\n if (l.Children) {\n for (const child of l.Children) {\n found = findLinkRecursive(relativePath, child);\n if (found) {\n return found;\n }\n }\n }\n if (l.Alternate) {\n for (const alt of l.Alternate) {\n found = findLinkRecursive(relativePath, alt);\n if (found) {\n return found;\n }\n }\n }\n return undefined;\n };\n\n if ((publication.Resources || publication.Spine || publication.Links)\n && pathInZip.indexOf(\"META-INF/\") !== 0\n && !pathInZip.endsWith(\".opf\")) {\n\n const relativePath = pathInZip;\n\n if (publication.Resources) {\n for (const l of publication.Resources) {\n link = findLinkRecursive(relativePath, l);\n if (link) {\n break;\n }\n }\n }\n if (!link) {\n if (publication.Spine) {\n for (const l of publication.Spine) {\n link = findLinkRecursive(relativePath, l);\n if (link) {\n break;\n }\n }\n }\n }\n if (!link) {\n if (publication.Links) {\n for (const l of publication.Links) {\n link = findLinkRecursive(relativePath, l);\n if (link) {\n break;\n }\n }\n }\n }\n if (!link &&\n !isDivina) {\n const err = \"Asset not declared in publication spine/resources!\" + relativePath;\n debug(err);\n res.status(500).send(\"<html><body><p>Internal Server Error</p><p>\"\n + err + \"</p></body></html>\");\n return;\n }\n }\n\n if (server.isSecured() && !link &&\n (pathInZip.indexOf(\"META-INF/\") === 0 || pathInZip.endsWith(\".opf\"))\n ) {\n res.status(200).send(\"<html><body></body></html>\");\n return;\n }\n\n let mediaType = mime.lookup(pathInZip);\n if (link && link.TypeLink) {\n mediaType = link.TypeLink;\n }\n\n const isText = (typeof mediaType === \"string\") && (\n mediaType.indexOf(\"text/\") === 0 ||\n mediaType.indexOf(\"application/xhtml\") === 0 ||\n mediaType.indexOf(\"application/xml\") === 0 ||\n mediaType.indexOf(\"application/json\") === 0 ||\n mediaType.indexOf(\"application/svg\") === 0 ||\n mediaType.indexOf(\"application/smil\") === 0 ||\n mediaType.indexOf(\"+json\") > 0 ||\n mediaType.indexOf(\"+smil\") > 0 ||\n mediaType.indexOf(\"+svg\") > 0 ||\n mediaType.indexOf(\"+xhtml\") > 0 ||\n mediaType.indexOf(\"+xml\") > 0);\n\n // const isVideoAudio = mediaType && (\n // mediaType.indexOf(\"audio/\") === 0 ||\n // mediaType.indexOf(\"video/\") === 0);\n // if (isVideoAudio) {\n // debug(req.headers);\n // }\n\n const isEncrypted = link && link.Properties && link.Properties.Encrypted;\n // const isObfuscatedFont = isEncrypted && link &&\n // (link.Properties.Encrypted.Algorithm === \"http://ns.adobe.com/pdf/enc#RC\"\n // || link.Properties.Encrypted.Algorithm === \"http://www.idpf.org/2008/embedding\");\n\n const isPartialByteRangeRequest = ((req.headers && req.headers.range) ? true : false);\n\n // if (isEncrypted && isPartialByteRangeRequest) {\n // const err = \"Encrypted video/audio not supported (HTTP 206 partial request byte range)\";\n // debug(err);\n // res.status(500).send(\"<html><body><p>Internal Server Error</p><p>\"\n // + err + \"</p></body></html>\");\n // return;\n // }\n\n let partialByteBegin = 0; // inclusive boundaries\n let partialByteEnd = -1;\n if (isPartialByteRangeRequest) {\n debug(req.headers.range);\n const ranges = parseRangeHeader(req.headers.range);\n // debug(ranges);\n\n if (ranges && ranges.length) {\n if (ranges.length > 1) {\n const err = \"Too many HTTP ranges: \" + req.headers.range;\n debug(err);\n // res.set(\"Content-Range\", `*/${contentLength}`);\n res.status(416).send(\"<html><body><p>Internal Server Error</p><p>\"\n + err + \"</p></body></html>\");\n return;\n }\n partialByteBegin = ranges[0].begin;\n partialByteEnd = ranges[0].end;\n\n if (partialByteBegin < 0) {\n partialByteBegin = 0;\n }\n }\n\n debug(`${pathInZip} >> ${partialByteBegin}-${partialByteEnd}`);\n }\n let zipStream_: IStreamAndLength;\n try {\n zipStream_ = isPartialByteRangeRequest && !isEncrypted ?\n await zip.entryStreamRangePromise(pathInZip, partialByteBegin, partialByteEnd) :\n await zip.entryStreamPromise(pathInZip);\n } catch (err) {\n debug(err);\n res.status(500).send(\"<html><body><p>Internal Server Error</p><p>\"\n + err + \"</p></body></html>\");\n return;\n }\n\n // The HTML transforms are chained here too, so cannot check server.disableDecryption at this level!\n const doTransform = true; // !isEncrypted || (isObfuscatedFont || !server.disableDecryption);\n\n const sessionInfo = (req.query as IRequestQueryParams)[URL_PARAM_SESSION_INFO];\n\n if (doTransform && link) {\n\n const fullUrl = `${server.serverUrl()}${req.originalUrl}`;\n\n let transformedStream: IStreamAndLength;\n try {\n transformedStream = await Transformers.tryStream(\n publication,\n link,\n fullUrl,\n zipStream_,\n isPartialByteRangeRequest,\n partialByteBegin,\n partialByteEnd,\n sessionInfo,\n );\n } catch (err) {\n debug(err);\n res.status(500).send(\"<html><body><p>Internal Server Error</p><p>\"\n + err + \"</p></body></html>\");\n return;\n }\n if (transformedStream) {\n if (transformedStream !== zipStream_) {\n debug(\"Asset transformed ok: \" + link.Href);\n }\n zipStream_ = transformedStream; // can be unchanged\n } else {\n const err = \"Transform fail (encryption scheme not supported?)\";\n debug(err);\n res.status(500).send(\"<html><body><p>Internal Server Error</p><p>\"\n + err + \"</p></body></html>\");\n return;\n }\n }\n\n if (isShow) {\n let zipData: Buffer;\n try {\n zipData = await streamToBufferPromise(zipStream_.stream);\n } catch (err) {\n debug(err);\n res.status(500).send(\"<html><body><p>Internal Server Error</p><p>\"\n + err + \"</p></body></html>\");\n return;\n }\n if (zipData) {\n debug(\"CHECK: \" + zipStream_.length + \" ==> \" + zipData.length);\n }\n res.status(200).send(\"<html><body>\" +\n \"<h1>\" + path.basename(pathBase64Str) + \"</h1>\" +\n \"<h2>\" + mediaType + \"</h2>\" +\n ((isText && zipData) ?\n (\"<p><pre>\" +\n zipData.toString(\"utf8\").replace(/&/g, \"&\")\n .replace(/</g, \"<\")\n .replace(/>/g, \">\")\n .replace(/\"/g, \""\")\n .replace(/'/g, \"'\") +\n \"</pre></p>\")\n : \"<p>BINARY</p>\"\n ) + \"</body></html>\");\n\n return;\n }\n\n server.setResponseCORS(res);\n\n if (isPartialByteRangeRequest || isEncrypted) {\n server.setResponseCacheHeaders(res, false);\n } else {\n server.setResponseCacheHeaders(res, true);\n }\n\n if (mediaType) {\n res.set(\"Content-Type\", mediaType);\n // res.type(mediaType);\n }\n\n res.setHeader(\"Accept-Ranges\", \"bytes\");\n\n if (isPartialByteRangeRequest) {\n if (partialByteEnd < 0) {\n partialByteEnd = zipStream_.length - 1;\n }\n const partialByteLength = isPartialByteRangeRequest ?\n partialByteEnd - partialByteBegin + 1 :\n zipStream_.length;\n // res.setHeader(\"Connection\", \"close\");\n // res.setHeader(\"Transfer-Encoding\", \"chunked\");\n res.setHeader(\"Content-Length\", `${partialByteLength}`);\n const rangeHeader = `bytes ${partialByteBegin}-${partialByteEnd}/${zipStream_.length}`;\n // debug(\"+++> \" + rangeHeader + \" (( \" + partialByteLength);\n res.setHeader(\"Content-Range\", rangeHeader);\n res.status(206);\n } else {\n res.setHeader(\"Content-Length\", `${zipStream_.length}`);\n // debug(\"---> \" + zipStream_.length);\n res.status(200);\n }\n\n if (isHead) {\n res.end();\n // } else if (!isPartialByteRangeRequest && zipStream_.length &&\n // mediaType && mediaType.indexOf(\"html\") >= 0) {\n\n // debug(\"===> BUFFER SEND (bypass streaming)\");\n // let zipData: Buffer;\n // try {\n // zipData = await streamToBufferPromise(zipStream_.stream);\n // } catch (err) {\n // debug(err);\n // res.status(500).send(\"<html><body><p>Internal Server Error</p><p>\"\n // + err + \"</p></body></html>\");\n // return;\n // }\n // if (zipData) {\n // debug(\"CHECK: \" + zipStream_.length + \" ==> \" + zipData.length);\n // }\n // debug(\"HTMLHTMLHTMLHTMLHTMLHTMLHTML\");\n // debug(zipData.toString(\"utf8\"));\n // debug(\"HTMLHTMLHTMLHTMLHTMLHTMLHTML\");\n // // res.send(zipStream_.stream);\n // res.send(zipData);\n } else {\n\n // const counterStream = new CounterPassThroughStream(++streamCounter);\n // debug(`===> STREAM PIPE [${counterStream.id}] ${link ? link.Href : \"link?\"} /// ${pathInZip}`);\n\n zipStream_.stream // readable\n .on(\"error\", function f(this: ReadableStream) {\n debug(\"ZIP ERROR \" + pathInZip);\n })\n // .on(\"finish\", function f(this: ReadableStream) {\n // debug(\"ZIP FINISH \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"end\", function f(this: ReadableStream) {\n // debug(\"ZIP END \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"close\", function f(this: ReadableStream) {\n // debug(\"ZIP CLOSE \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"error\", function f(this: ReadableStream) {\n // debug(\"ZIP ERROR \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"pipe\", function f(this: ReadableStream) {\n // debug(\"ZIP PIPE \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"unpipe\", function f(this: ReadableStream) {\n // debug(\"ZIP UNPIPE \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"drain\", function f(this: ReadableStream) {\n // debug(\"ZIP DRAIN \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"pause\", function f(this: ReadableStream) {\n // debug(\"ZIP PAUSE \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"resume\", function f(this: ReadableStream) {\n // debug(\"ZIP RESUME \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .pipe(counterStream) // readable (zipStream_.stream) --> writable (counterStream is duplex)\n // .on(\"progress\", function f(this: CounterPassThroughStream) {\n // debug(\"CounterPassThroughStream PROGRESS: \" +\n // this.id + \" -- \" + this.bytesReceived + \" = \" + pathInZip);\n // })\n // .on(\"finish\", function f(this: CounterPassThroughStream) {\n // debug(\"CounterPassThroughStream FINISH: \" +\n // this.id +\n // \" -- \" + this.bytesReceived + \" = \" + pathInZip);\n // })\n // .on(\"end\", function f(this: CounterPassThroughStream) {\n // debug(\"CounterPassThroughStream END: \" +\n // this.id + \" = \" + pathInZip);\n // })\n // .on(\"close\", function f(this: CounterPassThroughStream) {\n // debug(\"CounterPassThroughStream CLOSE: \" +\n // this.id + \" = \" + pathInZip);\n // })\n // .on(\"error\", function f(this: CounterPassThroughStream) {\n // debug(\"CounterPassThroughStream ERROR: \" +\n // this.id + \" = \" + pathInZip);\n // })\n // .on(\"pipe\", function f(this: CounterPassThroughStream) {\n // debug(\"CounterPassThroughStream PIPE: \" +\n // this.id + \" = \" + pathInZip);\n // })\n // .on(\"unpipe\", function f(this: CounterPassThroughStream) {\n // debug(\"CounterPassThroughStream UNPIPE: \" +\n // this.id + \" = \" + pathInZip);\n // })\n // .on(\"drain\", function f(this: CounterPassThroughStream) {\n // debug(\"CounterPassThroughStream DRAIN: \" +\n // this.id + \" = \" + pathInZip);\n // })\n // .on(\"pause\", function f(this: CounterPassThroughStream) {\n // debug(\"CounterPassThroughStream PAUSE: \" +\n // this.id + \" = \" + pathInZip);\n // })\n // .on(\"resume\", function f(this: CounterPassThroughStream) {\n // debug(\"CounterPassThroughStream RESUME: \" +\n // this.id + \" = \" + pathInZip);\n // })\n // readable (counterStream is duplex) --> writable (PassThrough is duplex)\n // .pipe(new PassThrough())\n // .on(\"finish\", function f(this: PassThrough) {\n // debug(\"PASS FINISH \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"end\", function f(this: PassThrough) {\n // debug(\"PASS END \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"close\", function f(this: PassThrough) {\n // debug(\"PASS CLOSE \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"error\", function f(this: PassThrough) {\n // debug(\"PASS ERROR \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"pipe\", function f(this: PassThrough) {\n // debug(\"PASS PIPE \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"unpipe\", function f(this: PassThrough) {\n // debug(\"PASS UNPIPE \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"drain\", function f(this: PassThrough) {\n // debug(\"PASS DRAIN \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"pause\", function f(this: PassThrough) {\n // debug(\"PASS PAUSE \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"resume\", function f(this: PassThrough) {\n // debug(\"PASS RESUME \" + counterStream.id + \" = \" + pathInZip);\n // })\n .pipe(res) // readable (counterStream is duplex) --> writable (res)\n .on(\"error\", function f(this: express.Response) {\n debug(\"RES ERROR \" + pathInZip);\n })\n .on(\"close\", function f(this: express.Response) {\n\n res.end(); // writable\n })\n // .on(\"finish\", function f(this: express.Response) {\n // debug(\"RES FINISH \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"end\", function f(this: express.Response) {\n // debug(\"RES END \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"close\", function f(this: express.Response) {\n // debug(\"RES CLOSE \" + counterStream.id + \" = \" + pathInZip);\n\n // res.end(); // writable\n\n // // // readable (counterStream is duplex) --> writable (res)\n // // counterStream.unpipe(res);\n\n // // // duplex writable + readable\n // // counterStream.end();\n\n // // // readable (zipStream_.stream) --> writable (counterStream is duplex)\n // // zipStream_.stream.unpipe(counterStream);\n\n // // // zipStream_.stream.close();\n // })\n // .on(\"error\", function f(this: express.Response) {\n // debug(\"RES ERROR \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"pipe\", function f(this: express.Response) {\n // debug(\"RES PIPE \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"unpipe\", function f(this: express.Response) {\n // debug(\"RES UNPIPE \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"drain\", function f(this: express.Response) {\n // debug(\"RES DRAIN \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"pause\", function f(this: express.Response) {\n // debug(\"RES PAUSE \" + counterStream.id + \" = \" + pathInZip);\n // })\n // .on(\"resume\", function f(this: express.Response) {\n // debug(\"RES RESUME \" + counterStream.id + \" = \" + pathInZip);\n // })\n ;\n }\n });\n\n routerPathBase64.param(\"asset\", (req, _res, next, value, _name) => {\n // At this point, route relative path is already normalised with respect to /../ and /./ dot segments,\n // but not double slashes (which seems to be an easy mistake to make at authoring time in EPUBs),\n // so we collapse multiple slashes into a single one.\n if (value) {\n value = value.replace(/\\/\\/+/g, \"/\");\n }\n\n (req as IRequestPayloadExtension).asset = value;\n next();\n });\n\n routerPathBase64.use(\"/:\" + _pathBase64 + \"/:\" + _asset + \"(*)\", routerAssets);\n}\n"]} |