Created
October 4, 2017 21:48
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| 'use strict'; | |
| var http = require('http'); | |
| module.exports.metaTagOriginRequestRewriter = (event, context, callback) => { | |
| const request = event.Records[0].cf.request; | |
| request.headers["x-dubsmash-uri"] = [{key: "X-Dubsmash-URI", value: request.uri}]; | |
| request.uri = "/index.html"; | |
| callback(null, request); | |
| }; | |
| const downloadContent = function(url, callback) { | |
| http.get(url, function(res){ | |
| var body = ''; | |
| res.on('data', function(chunk){ | |
| body += chunk.toString(); | |
| }); | |
| res.on('end', function(){ | |
| callback(body, null); | |
| }); | |
| }).on('error', function(e){ | |
| callback(null, e); | |
| }); | |
| }; | |
| module.exports.metaTagOriginResponseRewriter = (event, context, callback) => { | |
| const request = event.Records[0].cf.request; | |
| const response = event.Records[0].cf.response; | |
| var topicUriMatches = /\/topic\/([a-z0-9]{32})\/([a-z0-9]{32})/gi.exec(request.headers["x-dubsmash-uri"][0].value); | |
| if (topicUriMatches && topicUriMatches.length >= 3) { | |
| // We have a topic URI! | |
| response.headers["x-dubsmash-is-topic"] = [{key: "X-Dubsmash-Is-Topic", value: "true"}]; | |
| response.headers["x-dubsmash-topic-uuid"] = [{key: "X-Dubsmash-Topic-UUID", value: topicUriMatches[1]}]; | |
| response.headers["x-dubsmash-submission-uuid"] = [{key: "X-Dubsmash-Submission-UUID", value: topicUriMatches[2]}]; | |
| var url = 'http://messages.dubsmash.com/1/messages/topic_submission/' + topicUriMatches[2]; | |
| const host = request.headers["host"][0].value; | |
| downloadContent(url, (body, error) => { | |
| if (error) { | |
| callback(null, response); | |
| } else { | |
| var topicSubmission = JSON.parse(body); | |
| var video = topicSubmission.video; | |
| var metaTags = `<meta property="og:image" content="`+ video.thumbnail + `" /><meta property="og:video" content="` + video.video + `" />`; | |
| // Download the index file | |
| downloadContent("http://" + host + "/index.html", (indexBody, error) => { | |
| console.log(indexBody, error); | |
| if (error) { | |
| callback(null, response); | |
| } else { | |
| var finishedBody = indexBody.replace(/(<head>)/gi, "<head>" + metaTags); | |
| // Generate the final response and call the callback | |
| const newResponse = { | |
| status: '200', | |
| statusDescription: 'OK', | |
| headers: response.headers, | |
| body: finishedBody, | |
| }; | |
| console.log(JSON.stringify(newResponse)); | |
| callback(null, newResponse); | |
| } | |
| }); | |
| } | |
| }); | |
| } else { | |
| callback(null, response); | |
| } | |
| }; |
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