Am developing one using nodejs scraping and mysql. I want to store details into the mysql database. I have written the query it is saving sucessfully and it also checks for redundancy if we run the script again. If there is no data (empty table) in the table then, it is not checking for redundancy. All data is saving into
Tag: node.js
Node.js / Express.js – How to override/intercept res.render function?
I’m building a Node.js app with Connect/Express.js and I want to intercept the res.render(view, option) function to run some code before forwarding it on to the original render function. It looks like a contrived example, but it does fit in an overall framework I’m building. My knowledge of OOP and Prototypal inheritance on JavaScript is a bit weak. How would
How to efficiently check if variable is Array or Object (in NodeJS & V8)?
Is there any way to efficiently check if the variable is Object or Array, in NodeJS & V8? I’m writing a Model for MongoDB and NodeJS, and to traverse the object tree I need to know if the object is simple (Number, String, …) or composite (Hash, Array). It seems that V8 has fast built-in Array.isArray, but how to check
When to close MongoDB database connection in Nodejs
Working with Nodejs and MongoDB through Node MongoDB native driver. Need to retrieve some documents, and make modification, then save them right back. This is an example: With asynchronous nature, if the process of updating the document takes longer, then when cursor reaches the end of documents, database connection is closed. Not all updates are saved to the database. If
Remove a value from an array in CoffeeScript
I have an array: How could I check if “World” is in the array? Then remove it if it exists? And have a reference to “World”? Sometimes maybe I wanna match a word with a regexp and in that case I won’t know the exact string so I need to have a reference to the matched String. But in this
Create Instagram-esque filters with javascript?
Can I create Instagram-esque filters with javascript? The images can be processed client-side or server-side(node.js) I could overlay some pngs and box-shadows with css to get a limited amount of similar effects, but I was wondering if there was anything out there that can truly process images like this in js. Thanks! Answer I ended up finding this, http://vintagejs.com/
How can I ‘require’ CommonJS modules in the browser? [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 2 years ago. Improve this question What is the best way to load CommonJS modules as client-side JavaScript code in the browser? CommonJS modules put their functionality
Download a file from NodeJS Server using Express
How can I download a file that is in my server to my machine accessing a page in a nodeJS server? I’m using the ExpressJS and I’ve been trying this: But I can’t get the file name and the file type ( or extension ). Can anyone help me with that? Answer Update Express has a helper for this to
Error: Can’t set headers after they are sent to the client
I’m fairly new to Node.js and I am having some issues. I am using Node.js 4.10 and Express 2.4.3. When I try to access http://127.0.0.1:8888/auth/facebook, i’ll be redirected to http://127.0.0.1:8888/auth/facebook_callback. I then received the following error: The following is my code: May I know what is wrong with my code? Answer The res object in Express is a subclass of
How to encrypt data that needs to be decrypted in node.js?
We are using bcrypt for hashing passwords and data that never needs to be decrypted. What should we do to protect other user information that does need to be decrypted? For example, let’s say that we didn’t want a user’s real name to be in plain text in case someone was to obtain access to the database. This is somewhat