Phantom Js Save File Offered for Download Pdf Rendering with Phantomjs
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phantom js save file offered for download Pdf Rendering With Phantomjs. When it comes to generating printable documents in your Rails App a lot of people use prawn to create pdfs. Although prawn is a very powerful gem for this kind of task, things can easily get complicated if you have complex styling . At adeven we use the powerful d3js library to create daily reports for our adjust.io customers. Unfortunately, adding javascript-based content to your pdf is impossible with prawn, so we turned to PhantomJS. Generate pdf from html with PhantomJS. PhantomJS is a headless WebKit with JavaScript API. It’s well known for headless website testing in CI environments - check out Poltergeist to learn more about Testing JavaScript with PhantomJS. However, PhantomJS can also be used for screen-capturing as well as generating pdf documents. Shrimp. Our shrimp gem is a simple wrapper around PhantomJS’s pdf-rendering capabilities. You can download and install PhantomJS from http://phantomjs.org/download.html or simply do a. if you are on MacOS using homebrew. To install shrimp just type. Et voilá! A rendered pdf of your website. Shrimp comes with plenty of options that you can pass to the Phantom Object. However, you can also configure shrimp to your needs with a config file: Most of the options are self explanatory. Note that if you have very complex pages with a lot of javascript that needs to be executed after document ready, you might want to increase the rendering_time. For example with our d3js graphs we need 3 seconds to get good results. Keep in mind, that the rendering_timeout should be higher than the rendering_time. The Phantom Class come with three different rendering options: Shit’s being weird. If some error occurs you will still get a result - an empty file. This is necessary to let some asynchronous rendering like Shrimp::Middleware know about it. However you still can check the error response. To make sure the resulting pdf has the expected content, phantom does not follow redirects or render weird 500 status pages. So everything other than a 200 response results in an empty output file. If you prefer bang methods each of the rendering options comes with a bang! Shrimp::Middleware. The shrimp gem comes with a rack-aware Middleware that allows users to get a pdf view of any page on your site by appending .pdf to the URL. Non-Rails Rack apps. Rails apps. With Shrimp options. With conditions to limit routes that can be generated in pdf. Polling. To avoid deadlocks, Shrimp::Middleware renders the pdf in a separate process retuning a 503 Retry-After response Header. you can setup the polling interval and the polling offset in seconds. Caching. To avoid rendering the page on each request you can setup some the cache ttl in seconds. Cookies. If you use Rack::Session::Cookie in your RackApp the user cookie is passed to PhantomJS. Thus you don’t need to worry about Login Credentials or other session based content. However, as we also send pdf reports to our customers we want to render resources without being logged in. Since we use devise for user handling in our Rails App, things get easy with our own devise SignInInterceptor: With this setup we can add a to_pdf method to our resource. Fancy Ajax. The middleware return three different status codes based on the rendering status. To include some fancy Ajax stuff with jquery you can do. CSS Styling. The good thing about PhantomJS is that you only need to take care of webkit’s css implementation. To implement manual page breaks you can do: You don’t always have to fight the fat prawn when a lightweight shrimp can do. Phantom js save file offered for download. ‘read(string path, string/Object parameters)’ (string) The parameter object can contain : mode: Open Mode. A string made of ‘r’, ‘w’, ‘a/+’, ‘b’ characters. charset : An IANA, case insensitive, charset name. Opens the path and returns the entire contents as a string. When errors occur during a call, it will throw a ‘Unable to open file PATH’ and hang execution. Note that the behavior of this method is closely related to fs.open. Examples. ≪ File System Module. P separator P workingDirectory M absolute M changeWorkingDirectory M copyTree M copy M exists M isAbsolute M isDirectory M isExecutable M isFile M isLink M isReadable M isWritable M lastModified M list M makeDirectory M makeTree M move M open M readLink M read M removeDirectory M removeTree M remove M size M touch M write. © Copyright 2010-2020 Ariya Hidayat — Homepage design by Maurice Svay — Documentation design by Jamie Mason. uploadFile. Uploads the specified file ( filename ) to the form element associated with the selector . This function is used to automate the upload of a file, which is usually handled with a file dialog in a traditional browser. Since there is no dialog in this headless mode, such an upload mechanism is handled via this special function instead. Examples. ≪ Web Page Module. P canGoBack P canGoForward P clipRect P content P cookies P customHeaders P event P focusedFrameName P frameContent P frameName P framePlainText P frameTitle P frameUrl P framesCount P framesName P libraryPath P navigationLocked P offlineStoragePath P offlineStorageQuota P ownsPages P pagesWindowName P pages P paperSize P plainText P scrollPosition P settings P title P url P viewportSize P windowName P zoomFactor M addCookie M childFramesCount M childFramesName M clearCookies M close M currentFrameName M deleteCookie M evaluateAsync M evaluateJavaScript M evaluate M getPage M goBack M goForward M go M includeJs M injectJs M openUrl M open M release M reload M renderBase64 M renderBuffer M render M sendEvent M setContent M stop M switchToChildFrame M switchToFocusedFrame M switchToFrame M switchToMainFrame M switchToParentFrame M uploadFile H Callback Triggers H onAlert H onCallback H onClosing H onConfirm H onConsoleMessage H onError H onFilePicker H onInitialized H onLoadFinished H onLoadStarted H onNavigationRequested H onPageCreated H onPrompt H onResourceError H onResourceReceived H onResourceRequested H onResourceTimeout H onUrlChanged. © Copyright 2010-2020 Ariya Hidayat — Homepage design by Maurice Svay — Documentation design by Jamie Mason. Phantom js save file offered for download. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. What can I do to prevent this in the future? If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Another way to prevent getting this page in the future is to use Privacy Pass. You may need to download version 2.0 now from the Chrome Web Store. Cloudflare Ray ID: 67adb0275e2715e0 • Your IP : 188.246.226.140 • Performance & security by Cloudflare. PhantomJS - Scriptable Headless Browser. Important : PhantomJS development is suspended until further notice (more details). PhantomJS is a headless web browser scriptable with JavaScript. It runs on Windows, macOS, Linux, and FreeBSD. Using QtWebKit as the back-end, it offers fast and native support for various web standards: DOM handling, CSS selector, JSON, Canvas, and SVG. The following simple script for PhantomJS loads Google homepage, waits a bit, and then captures it to an image. PhantomJS is an optimal solution for: Ready to play with PhantomJS? Install and follow the Quick Start guide. Want to learn more? Read the FAQ, explore more examples, and study the complete API documentation..