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Resolving error "SSL certificate problem: self signed certificate in certificate chain"
In a PHP application, cURL is frequently used to make connection to remote server to request some resource. It can be used to transfer data with different protocols such as HTTP, HTTPS, FTP etc. While using cURL in PHP, someone may get an error with message similar to "SSL certificate problem: self signed certificate in certificate chain". This may happen when cURL tries to make a SSL connection server and the server returns a server certificate which is self-signed and it's not trusted by the c...
Run code with multiple files in the same main package in GoLang
To run a GoLang program, there needs to be a main() function defined. In some cases when developing some demo program which has multiple files and just wanna put them in the same main package and this folder is not in GOPATH, how to run the program? Let's say we have following folder structure where the main() function is defined in main.go. If you just run below command, it would fail to start to run the program and gives some error if some struct is defined in other files and being used. PS D...
EXECUTABLE,GOLANG,MAIN PACKAGE,MULTIPLE FILE 2021-05-15 10:20:10
Circumventing browser connection limits for fun and profit
A few days ago, this video hosted by metacafe popped up on digg, explaining how to increase site download times by tweaking your browser settings to increase connection parallelism. To explain why this works, let’s step back a bit to discuss how browsers manage server connections. In building any application, developers are often required to make ‘utilitarian’ choices. Pretentiously paraphrasing Jeremy Bentham, ‘utilitarian’ describes an approach that ââ‚...
HTTP,Concurrent connection limit,Solution,AJAX 2011-12-14 13:01:02
How to send asynchronous requests in PHP
It’s easy to make asynchronous calls in PHP with just a little bit of HTTP header knowledge and some library code around PHP sockets. This technique is useful when posting requests to your own server for bits of logic you’d like to run in the background. If you don’t control the endpoint, you might not be comfortable with some of the limitations, such as the inability to read anything from the response. So, you couldn’t post data to a we...
PHP,Asynchronous request,socket 2012-04-28 06:45:51
Advantages and disadvantages of GoLang
GoLang is a strong typed language which means it is less flexible than interpreted languages by nature. But Go provides Any type(interface) and Reflect mechanism which make the language very close to interpreted languages on flexibility. More and more people start to learn GoLang. This post is mainly for listing down some of the advantages and disadvantages of GoLang. Advantages Performance(Machine code) GoLang is a compilation language which can be compiled to machine code and the compiled bina...
GENERICS,GOROUTINE,GOLANG,DISADVANTAGE,ADVANTAGE 2018-11-10 20:46:45
Start to work with rollup.js to pack JS files
rollup.js is a module bundler for JavaScript. It compiles small piece of JavaScript modules spreading in different files into a single larger standardized ES code file. This post will show some entry level usage for this library. Introduction Normally a bundler tool would compile a few small JavaScript files into a single JavaScript so that web browser can read, parse and render it properly. A bundler tool may be needed because of a few reasons: Some early stage browsers don't understand module...
ROLLUP.JS,COMMONJS,ES MODULE,BUNDLE,WEBPACK 2022-06-12 00:00:14
How to Set Spring profile With Example
Technology: Spring Profiles provides a way to isolates the parts of application configuration, it will make available only in certain environments. It is mainly useful it wants to load spring beans based on environment configuration, for example if the operating system is windows we can load some specific spring beans, if it is other than load different spring beans. One more scenario where spring profiles widely used, like for QA environment we will use some database which is hosted local...
JAVA,PROFILE,SPRING,DEVELOPMENT,APPLICATIONS 2018-07-20 01:17:23
Remove duplicated elements in JavaScript array
During interviews, one frequent question asked would be something like how to remove duplicated elements in a JavaScript array and how many different ways you can think of. The interviewee would also be asked to write the code down. In real applications, normally front end would not need to handle this case since normally it would be done by backend, but still it's necessary for front end developers to know different ways of doing this. This post will share some of the common ways to remove dupl...
JAVASCRIPT,ARRAY,DUPLICATED ELEMENT 2018-09-21 22:32:10
Automatically post to Facebook from PHP script
Facebook is currently on of the most important publishing and traffic generating sources for many websites. Manually Cross publishing content on your own site and Facebook seems like a lot of extra work. This post guides you through the creation of a Facebook application that can automatically post messages and other types of content on your Facebook wall. Getting started Building a php script that automatically posts status updates on your wall requires the following steps: Download Faceboo...
XMLHttpRequest Level 2 user guide
XMLHttpRequest is a web browser interface, it makes it possible for JavaScript doing HTTP(s) communication. Microsoft's IE5 first introduced XMLHttpRequest, because it's so useful that many other browsers also adopted this. AJAX came to the front since. However, this interface is not standardized, implementation among different browsers is different, with the emerging of HTML5, W3C is considering to standardize this interface. In February 2008, they proposed a XMLHttpRequest Level 2 draft. This ...
XMLHttpRequest, progress, upload, binary data 2012-09-19 11:51:50
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