base on <h1>Multi Threaded Proxy Server with and without Cache</h1> This project is implemented using `C` and Parsing of HTTP referred from <a href = "https://github.com/vaibhavnaagar/proxy-server"> Proxy Server </a> ## Index - [Project Theory](https://github.com/Lovepreet-Singh-LPSK/MultiThreadedProxyServerClient#project-theory) - [How to Run](https://github.com/Lovepreet-Singh-LPSK/MultiThreadedProxyServerClient#How-to-Run) - [Demo](https://github.com/Lovepreet-Singh-LPSK/MultiThreadedProxyServerClient#Demo) - [Contributing](https://github.com/Lovepreet-Singh-LPSK/MultiThreadedProxyServerClient#contributing) ## Project Theory [[Back to top]](https://github.com/Lovepreet-Singh-LPSK/MultiThreadedProxyServerClient#index) ##### Introduction ##### Basic Working Flow of the Proxy Server:  ##### How did we implement Multi-threading? - Used Semaphore instead of Condition Variables and pthread_join() and pthread_exit() function. - pthread_join() requires us to pass the thread id of the the thread to wait for. - Semaphore’s sem_wait() and sem_post() doesn’t need any parameter. So it is a better option. ##### Motivation/Need of Project - To Understand → - The working of requests from our local computer to the server. - The handling of multiple client requests from various clients. - Locking procedure for concurrency. - The concept of cache and its different functions that might be used by browsers. - Proxy Server do → - It speeds up the process and reduces the traffic on the server side. - It can be used to restrict user from accessing specific websites. - A good proxy will change the IP such that the server wouldn’t know about the client who sent the request. - Changes can be made in Proxy to encrypt the requests, to stop anyone accessing the request illegally from your client. ##### OS Component Used ​ - Threading - Locks - Semaphore - Cache (LRU algorithm is used in it) ##### Limitations ​ - If a URL opens multiple clients itself, then our cache will store each client’s response as a separate element in the linked list. So, during retrieval from the cache, only a chunk of response will be send and the website will not open - Fixed size of cache element, so big websites may not be stored in cache. ##### How this project can be extended? ​ - This code can be implemented using multiprocessing that can speed up the process with parallelism. - We can decide which type of websites should be allowed by extending the code. - We can implement requests like POST with this code. # Note :- - Code is well commented. For any doubt you can refer to the comments. ## How to Run ```bash $ git clone https://github.com/Lovepreet-Singh-LPSK/MultiThreadedProxyServerClient.git $ cd MultiThreadedProxyServerClient $ make all $ ./proxy <port no.> ``` `Open http://localhost:port/https://www.cs.princeton.edu/` # Note: - This code can only be run in Linux Machine. Please disable your browser cache. - To run the proxy without cache Change the name of the file (`proxy_server_with_cache.c to proxy_server_without_cache.c`) MakeFile. ## Demo  - When website is opened for the first time (`url not found`) then cache will be miss. - Then if you again open that website again then `Data is retrieved from the cache` will be printed. ## Contributing [[Back to top]](https://github.com/Lovepreet-Singh-LPSK/MultiThreadedProxyServerClient#index) Feel free to add some useful. You can see `How this code can be extended`. Use ideas from there and feel free to fork and CHANGE. #### Enjoy CODE and pull requests are highly appreciated. ", Assign "at most 3 tags" to the expected json: {"id":"8321","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"