overleaf/services/web/app/coffee/Features/Compile/CompileController.coffee

Metrics = require "../../infrastructure/Metrics"
Project = require("../../models/Project").Project
CompileManager = require("./CompileManager")
logger  = require "logger-sharelatex"
request = require "request"
Settings = require "settings-sharelatex"

module.exports = CompileController =
	downloadPdf: (req, res, next = (error) ->)->
		Metrics.inc "pdf-downloads"
		project_id = req.params.Project_id
		Project.findById project_id, {name: 1}, (err, project)->
			res.contentType("application/pdf")
			if !!req.query.popupDownload
				logger.log project_id: project_id, "download pdf as popup download"
				res.header('Content-Disposition', "attachment; filename=#{project.getSafeProjectName()}.pdf")
			else
				logger.log project_id: project_id, "download pdf to embed in browser"
				res.header('Content-Disposition', "filename=#{project.getSafeProjectName()}.pdf")
			CompileController.proxyToClsi("/project/#{project_id}/output/output.pdf", req, res, next)

	deleteAuxFiles: (req, res, next) ->
		project_id = req.params.Project_id
		CompileController.proxyToClsi("/project/#{project_id}", req, res, next)

	compileAndDownloadPdf: (req, res, next)->
		project_id = req.params.project_id
		CompileManager.compile project_id, null, {}, (err)->
			if err?
				logger.err err:err, project_id:project_id, "something went wrong compile and downloading pdf"
				res.send 500
			url = "/project/#{project_id}/output/output.pdf"
			CompileController.proxyToClsi url, req, res, next

	getFileFromClsi: (req, res, next = (error) ->) ->
		CompileController.proxyToClsi("/project/#{req.params.Project_id}/output/#{req.params.file}", req, res, next)

	proxyToClsi: (url, req, res, next = (error) ->) ->
		logger.log url: url, "proxying to CLSI"
		url = "#{Settings.apis.clsi.url}#{url}"
		oneMinute = 60 * 1000
		proxy = request(url: url, method: req.method, timeout: oneMinute)
		proxy.pipe(res)
		proxy.on "error", (error) ->
			logger.warn err: error, url: url, "CLSI proxy error"