Socket Programming Tutorials In C For Beginners | Part 2 | Eduonix
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- เผยแพร่เมื่อ 21 ต.ค. 2024
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Sockets are the basic building blocks in network communication. In this video, you will get details about the HTTP Protocol in Socket programming.
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Excellent series, really enjoyed watching it, only 2 videos though, I see that there are not so much views on this video so I suspect that this series is not going to be extended which is really a shame, this is best socket C programming basics video I found so far and it would be nice to see what can be build on top of it. Thanks
Thank you so much Sloba...Keep watching and also subscribe us to get updates on latest courses.
If its a blank screen do as the guy below suggested:
Make sure your index.html has only one line.
fgets reads only one line at once.
The file also has to be on the same folder as your executable.
Thank u so much !
thanks!
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Not all heroes wear capes! Thank you keep going!!
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Awesome videos ! It's sad the series stopped ! Hope one day it will continue !
I think if you are using Google Chrome, the browser will continue to buffer. First make sure that your index.html is just one line. Second remove the close(client_socket). For some reason, it receives the http response but doesn't display it on the web browser. After these changes it should work.
Thank you so much for sharing. its really helps everyone
Thank you! I was getting a net::ERR_CONNECTION_RESET but my program worked after making these changes.
Thanks again for these two videos, they were solid. I'd love to learn to implement multiple processes at once, or event based programming using C, in case you are trying to find more interesting tutorials to make.
Please keep up the C stuff, it's really good!
These are the best c socket tutorials on TH-cam. Please do more!
Thank you so much! yes we will do more, stay tuned!
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This is an amazing series, thank you so much ! is there also an advanced course on socket programming ?
bump
5:11 -> ඞ
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Thank you. All great. I had a problem with properly closing sockets but easily googled the solution, which is shutting them down before closing them. I hope this helps others. Let me know if you need more info.
Thank you ...... Nice Tutorial.....
this is god send, thanks!
If anyone wants to read in a multi-line HTML file, here's what worked for me (change the string sizes accordingly to accommodate your HTML file):
char buffer[128];
char response_data[2048] = {'\0'}; //Initialize to '\0' so there's no garbage values since we will append to the end of this string
while(fgets(buffer, sizeof(buffer), html_data)){
strcat(response_data, buffer);
}
char http_header[4096] = "HTTP/1.1 200 OK
";
strcat(http_header, response_data);
Thank you for sharing. It will help others.
I knew if I scrolled far enough I would find someone with the answer to my question, thank you
@@thesilvercreepers I cannot overstate this. I was almost giving up till I found this. Great guide there!
Fantastic lecture, thank you sir!
Thanks Super man!
Excellent series, really enjoyed watching it
thank you very helpful 😉😊
Any approach fro Huffman encoding implementation in C/C++ using socket programming
hello, I cant seem to get to know how to connect the httpclient with the httpserver applications
, the video was great, thanks.
Thank you... You help me very much.. :))
I'm from Brazil...
Your welcome!! Subscribe for more.
Thank yooooouuuuuuuu!!!!!!!
This is great, but I would have loved to see just a tad bit more. For example a "stream" approach so that you could send more than 2048 - or any size of bytes. My first thought when seeing this was what if it was more than 2048 bytes? :) Server and Client would need to loop to accommodate for this.
Really great and helpful series of tutorials. Thank you a lot for all the effort you've put in there.
Thanks a lot. Subscribe for more tutorials!
If anyone is having segfaults change the *argv to **argv
really helpful!
great series, i think next thing that u should do is to make a series for web apis in c. that would be greaat. im looking forward for it. im unable to find any resource for that on internet
Thank you Hamza. You can check out this playlist: goo.gl/dNtYuz Don't forget to subscribe for more videos!
ExcelIent videos! I will wait your next videos about smtp server and client !
Thank you, subscribe for more tutorials!
Im assuming that to stop the (google chrome) browser from buffering that you would take it out of the infinite loop. Is there another way to close the HTTP connection
Please do more!
@Afaf sure! we're working on it! stay tuned.
Please can you help me?
I do the same as you when I compile ./http_server but I cant open Localhost:8001. Can you help me to fix this ? Thanks for your time
thanks it was really useful
Thank you Sana! Subscribe for more tutorials.
struct sockaddr_in server_addr; //incomplete type is not allowed
The line inet_aton(address, &remote_address.sin_addr.s_addr); didn't compile for me, but inet_aton(address, &remote_address.sin_addr);
worked (ref: www.gta.ufrj.br/ensino/eel878/sockets/inet_ntoaman.html).
Thanks for the tutorials!
I just can't get over the fact that he didn't use intellisense at once and did all of that XD
Great vid tho' :D
Where can I learn about Raw sockets?
So how do i implement this with a URL request? can the server respond with whats on the page? Just wondering if thats possible can you please answer? thank you!
Super Video - but under Firefox 88.0.1 doesn't work there is a massive error - "character coding is wrong... blablabla etc..." we search the problem but there is no way to find out why we send the wrong coding for german characters. Did you know why is this so?
Also a interest problem is that if you compile the http_server.c on my Min20.1 with port 80 you never can run it on this machine. There is now port 54377 or a other port. If you change the port nubmer to i.e. 8001 or 4444 and compile it again that worked well but not with port 80. netstat -anput show you all programms liekt he ./http_server and the port number but port 80 don't will work on this machine!? why is that so? If I stop the ./http_server there is no other programm that used by port 80 on this machine also no development system is running like XAMPE or so. What can that be? The http.client work on port 80 and I can call google.at here in my Country. One das later I found Out that the Port will Change of you've a User of you start the sudo ./http_server then Port 80 Stay! Best Regards Volker
1 question, I can get response 200ok when I run code in my home but when I go another place like university I always get 302 found . In same address (but local server it's work every where)
thank you
You can check this link airbrake.io/blog/http-errors/302-found to solve this above problem.
I got the same code you put I had to add #include for the close() to work after the tutorial on this video I was not able to pull it up in my browser any idea? I am running Ubuntu 17.04
I have some problem did you fix that ?
i had the same problem and i changed it to HTTP/1.0,
When I typing the id address of coursera.org .It giving me 400 bad request error using your code. Please anyone help?
Thank you
how to print the whole entity body (i.e "last modified, date etc") in server response?
Hi. Thank you so much for the video :)
When I run the client, it sends back the sample "index.html" file which I created "Server html" but in the video it displays the response from google. What am i missing here? I get the same response even if I don't pass any IP address in the command line or if i enter some random text as an argument.
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The httpclient code does not work and it seems to be from a time where IPv4 addresses were the norm.
The green text on black ground throws us back to the 80s where networking was simpler.
It seems many have problems with the http server when using a browser as a client.
I can "telnet" to the server, e.g. "telnet localhost 8001" and get response
HTTP/1.1 200 OK
welcome to HTTP server
but when i connect via a browser (localhost:8001) the browser is blank...
However, when replacing close() with pclose(), then the browser will display the html code.
Why ? BTW I use Cygwin64 and the compiler warned about close()...
You can download the resource file from the link and update your code. s3.amazonaws.com/edu-resources/LearnSocket-Programming-inCfromScratch/resources-SocketsinC.zip let us know if you have any issue.
hey, im having the same issue. and i dont have a pclose() function in the headers. how can i solve it?
what compiler you would recommend for windows user ? this for cuz i have visual stdio 2013 and dev c ++ while having a problem in code blocks , can you put a tutorial and give a link also plz thanks ?
You can use winsock for socket programming in windows. check out the link given below.
searchwindowsserver.techtarget.com/definition/Winsock
How the ./http_server is accessing or linked that makes the output from index.html, could you please show the Makefile, are you listing the index.html in Makefile? How the http_server is accessing the index.html. If you could explain I really appreciate it. Thank you.
Please refer to the link mentioned below to get some idea about your issue.
stackoverflow.com/questions/43569635/how-does-my-html-page-have-access-to-socket-io-on-client-side
When i run the http client program to send an http request to google server, i get the response: "HTTP/1.0 400 Bad Request". Address resolution, connection establishment, request send & response reception functions are all functioning properly. still i am getting the Bad Request message. I'm using the exact same code in the video.
If you are on a Mac, you may want to remove
and use
to end your request. Let me know if this helps.
Why does the server bind its address to port 8001 but the client connects to remote port 80 ?
This is not a problem.
amazing tutorial, thank sir for sharing your knowlegde, but to those whom is having some issues:
open your localhost address on firefox, it works for me, since when i open the web page in chrome i get the response http 200 ok, however i can't visualize the web page, the browser does download automatically the source as data file anyone know why occurs this ?
Maybe you need add Content-Type header "Content-Type: text/html" .
i am unable to retrieve any html file using http client that you made.It keeps on giving connection refused error.
Maybe the port you are trying to connect to is not open. So either you are connecting to the wrong IP address, or to the wrong port. Please check carefully.
I am getting 503 service unavailable and some time 400 error. I used google.com and ifttt.com
please let me know where i did mistake.
Post your code in pastebin.com and I can take a look.
what is bzero() function please explain with example.
SYNOPSIS
[XSI] [Option Start] #include
void bzero(void *s, size_t n); [Option End]
DESCRIPTION
The bzero() function shall place n zero-valued bytes in the area pointed to by s.
RETURN VALUE
The bzero() function shall not return a value.APPLICATION USAGE
The memset() function is preferred over this function.
For maximum portability, it is recommended to replace the function call to bzero() as follows:
#define bzero(b,len) (memset((b), '\0', (len)), (void) 0)Check below link it may help you
stackoverflow.com/questions/29182966/do-you-have-a-simple-bzero-example
set buffer to zero
It sets a region of memory, specified by a address and the length of bytes, to 0
While executing I am getting an error of Segmentation Fault Core dump. Please suggest me what to do
which file did you execute? client or http_server?
This might be caused if you are executing the wrong file.
I am getting this too
I get a blank screen when I go to localhost:8001 . Anyone has an idea why ?
you need you html one line
Hey! When I try to open the page on the browser, it shows a blank page :3 help!
Can you elaborate your question?
Eduonix Support the html page loads up on the browser without an error or timeout but is not displaying any content, its just a blank white page
You can download the resource from this link s3.amazonaws.com/edu-resources/LearnSocket-Programming-inCfromScratch/resources-SocketsinC.zip
my localhost:8080 keeps loading and data won't show
Have you checked your code?
my localhost:8001 also keeps loading.... i checked my code it is correct #include
#include
#include
#include
#include
#include
int main(){
FILE *html_data;
html_data=fopen("index.html","r");
char response_data[1024];
fgets(response_data,1024,html_data);
char http_header[2048]="HTTP/1.1 200 OK
";
strcat(http_header,response_data);
//create a socket
int server_socket;
server_socket=socket(AF_INET,SOCK_STREAM,0);
//specify address for socket
struct sockaddr_in server_address;
server_address.sin_family=AF_INET;
server_address.sin_port=htons(8001);
server_address.sin_addr.s_addr=INADDR_ANY;
//bind the socket to specified IP and port
bind(server_socket,(struct sockaddr *) &server_address,sizeof(server_address));
//listen
listen(server_socket,5);
int client_socket;
//send or receive
while(1){
client_socket=accept(server_socket,NULL,NULL);
send(client_socket,http_header,sizeof(http_header),0);
close(client_socket);
}
return 0;
}
Make sure your index.html has only one line.
fgets reads only one line at once.
The file also has to be on the same folder as your executable.
I tried you code, nothing happining when I run your code
on ubuntu
I think if you are using Google Chrome, the browser will continue to buffer. First make sure that your index.html is just one line. Second remove the close(client_socket). For some reason, it receives the http response but doesn't display it on the web browser.
Thank you alot your video very useful.
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