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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 crypto from \"crypto\";\nimport * as css2json from \"css2json\";\nimport * as debug_ from \"debug\";\nimport * as express from \"express\";\nimport * as jsonMarkup from \"json-markup\";\nimport * as path from \"path\";\n\nimport { TaJsonSerialize } from \"@r2-lcp-js/serializable\";\nimport { Publication } from \"@r2-shared-js/models/publication\";\nimport {\n getAllMediaOverlays, getMediaOverlay, mediaOverlayURLParam, mediaOverlayURLPath,\n} from \"@r2-shared-js/parser/epub\";\nimport { encodeURIComponent_RFC3986, isHTTP } from \"@r2-utils-js/_utils/http/UrlUtils\";\nimport { sortObject, traverseJsonObjects } from \"@r2-utils-js/_utils/JsonUtils\";\n\nimport { IRequestPayloadExtension, IRequestQueryParams, _pathBase64, _show } from \"./request-ext\";\nimport { Server } from \"./server\";\n\nconst debug = debug_(\"r2:streamer#http/server-mediaoverlays\");\n\nexport function serverMediaOverlays(server: Server, routerPathBase64: express.Router) {\n\n // https://github.com/mafintosh/json-markup/blob/master/style.css\n const jsonStyle = `\n.json-markup {\n line-height: 17px;\n font-size: 13px;\n font-family: monospace;\n white-space: pre;\n}\n.json-markup-key {\n font-weight: bold;\n}\n.json-markup-bool {\n color: firebrick;\n}\n.json-markup-string {\n color: green;\n}\n.json-markup-null {\n color: gray;\n}\n.json-markup-number {\n color: blue;\n}\n`;\n\n const routerMediaOverlays = express.Router({ strict: false });\n // routerMediaOverlays.use(morgan(\"combined\", { stream: { write: (msg: any) => debug(msg) } }));\n\n routerMediaOverlays.get([\"/\", \"/\" + _show + \"/:\" + mediaOverlayURLParam + \"?\"],\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.lcpPass64) {\n reqparams.lcpPass64 = (req as IRequestPayloadExtension).lcpPass64;\n }\n\n const isShow = req.url.indexOf(\"/show\") >= 0 || (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 const isCanonical = (req.query as IRequestQueryParams).canonical &&\n (req.query as IRequestQueryParams).canonical === \"true\";\n\n const isSecureHttp = req.secure ||\n req.protocol === \"https\" ||\n req.get(\"X-Forwarded-Proto\") === \"https\"\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 rootUrl = (isSecureHttp ? \"https://\" : \"http://\")\n + req.headers.host + \"/pub/\"\n + (reqparams.lcpPass64 ?\n (server.lcpBeginToken + encodeURIComponent_RFC3986(reqparams.lcpPass64) + server.lcpEndToken) :\n \"\")\n + encodeURIComponent_RFC3986(reqparams.pathBase64);\n\n function absoluteURL(href: string): string {\n return rootUrl + \"/\" + href;\n }\n\n function absolutizeURLs(jsonObject: any) {\n traverseJsonObjects(jsonObject,\n (obj) => {\n if (obj.text && typeof obj.text === \"string\"\n && !isHTTP(obj.text)) {\n // obj.text_ = obj.text;\n obj.text = absoluteURL(obj.text);\n }\n\n if (obj.audio && typeof obj.audio === \"string\"\n && !isHTTP(obj.audio)) {\n // obj.audio_ = obj.audio;\n obj.audio = absoluteURL(obj.audio);\n }\n });\n }\n\n let objToSerialize: any = null;\n\n const resource = isShow ?\n ((req.query as IRequestQueryParams).show ?\n (req.query as IRequestQueryParams).show :\n reqparams[mediaOverlayURLParam]) :\n (req.query as IRequestQueryParams)[mediaOverlayURLParam];\n if (resource && resource !== \"all\") {\n try {\n objToSerialize = await getMediaOverlay(publication, resource);\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 } else {\n try {\n objToSerialize = await getAllMediaOverlays(publication);\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\n if (!objToSerialize) {\n objToSerialize = [];\n }\n\n const jsonObj = TaJsonSerialize(objToSerialize);\n // jsonObj = { \"media-overlay\": jsonObj };\n\n if (isShow) {\n absolutizeURLs(jsonObj);\n\n // const jsonStr = global.JSON.stringify(jsonObj, null, \" \");\n\n // // breakLength: 100 maxArrayLength: undefined\n // const dumpStr = util.inspect(objToSerialize,\n // { showHidden: false, depth: 1000, colors: false, customInspect: true });\n\n const jsonPretty = jsonMarkup(jsonObj, css2json(jsonStyle));\n\n res.status(200).send(\"<html><body>\" +\n \"<h1>\" + path.basename(pathBase64Str) + \"</h1>\" +\n \"<p><pre>\" + jsonPretty + \"</pre></p>\" +\n // \"<p><pre>\" + jsonStr + \"</pre></p>\" +\n // \"<p><pre>\" + dumpStr + \"</pre></p>\" +\n \"</body></html>\");\n } else {\n // absolutizeURLs(jsonObj);\n\n server.setResponseCORS(res);\n res.set(\"Content-Type\", \"application/vnd.syncnarr+json; charset=utf-8\");\n\n const jsonStr = isCanonical ?\n global.JSON.stringify(sortObject(jsonObj), null, \"\") :\n global.JSON.stringify(jsonObj, null, \" \");\n\n const checkSum = crypto.createHash(\"sha256\");\n checkSum.update(jsonStr);\n const hash = checkSum.digest(\"hex\");\n\n const match = req.header(\"If-None-Match\");\n if (match === hash) {\n debug(\"smil cache\");\n res.status(304); // StatusNotModified\n res.end();\n return;\n }\n\n res.setHeader(\"ETag\", hash);\n // server.setResponseCacheHeaders(res, true);\n\n res.status(200);\n\n if (isHead) {\n res.end();\n } else {\n res.send(jsonStr);\n }\n }\n });\n\n routerPathBase64.use(\"/:\" + _pathBase64 + \"/\" + mediaOverlayURLPath, routerMediaOverlays);\n}\n"]} |