Programming :: Execute C Program Through HTML On HTTP Web Server?
Oct 15, 2009
I would like to execute an already written C program that I am running on my embedded Linux, but from afar - through a HTML page. I am running an embedded Linux on my FPGA prototype board with a MicroBlaze soft processor. On this Linux i am running a httpd web server - I can serve html web pages to the outside through Ethernet connection. Now, I have a program written in C in this embedded Linux in /bin/gpio-test that does some stuff with my IO devices. Now I would like to control these IO devices through HTML web page - so I would like to be able to run this gpio-test program from a html web page and possibly send the program some parameters.
Using netcat, nc(1), craft a valid http/1.1 request for getting http headers (not the html file itself!) for the main index page of www dot aalto dot fi. What request method did you use? Which headers did you need to send to the server? What was the status code for the request? Which headers did the server return? Explain the purpose of each header.
nc -v www dot aalto dot fi 8080 HEAD / HTML/1.1 host: www dot aalto dot fi And it returns: 200 OK Content-Length: 858 Content-Type: text/html Last-Modified: Thu, 02 Sep 2010 12:46:01 GMT [Code]....
I really don't know what does it mean. Question 2: Using netcat, nc(1), start a bogus web server listening on the loopback interface port 8080. Verify with netstat(, that the server really is listening where it should be. Direct your browser to the bogus server and capture the User-Agent: header "Direct your browser to the bogus server and capture the User-Agent: header" I don't understand this question.
Assume two applications, Application A and Application B. Both are written in C language.I had tried to use system() function in Application A to execute Application B. It success, but Application A cannot continue its own tasks before Application B exit. I want Application A to execute Application B, but Application A can continue its tasks without waiting for Application B to exit.
I have a file with two fields of numbers that I want to use as input for another program.
Code:
The above code does not work, as I think it would take the whole first and second fields as the input for one particular instance of the program 'inputbashangle'. What I want is to get the first two numbers from the first line of the file 'outfailtest', execute 'inputbashangle' with them, then move on to the first two numbers of the second line for all the lines of 'outfailtest'.
i have a server program which accept multiple client connection and am using polling. like every 2 secs it will look to client whether any data is received after it binded. i have used setitimer but there is runtime error i got.. the server accept all client connection but doesn't execute any msg which client sent.
what is the best way (i.e standard way that is supported on all browsers and probably as well followed by web crawlers).... to include an html file either locally or externally in another ? Of course , i've done the research and i also know that there are server side includes (php , asp ...you name it) at the moment , i'm using this:
Quote:
<script type="text/javascript" src="path to file/include-file.js"> </script>
however, i've been warned that this method may not show up in some browsers as some tend to ignore this tag and that crawlers like your favorite search engine wouldn't bother reading this. so , what is the best and safest way to do the job? and btw , the reason why i've ousted SSI's from the start is because of among other things:
1) the fact that the included file is static html and because the text is included pretty much everywhere
2) hoping to reduce load time as the code (if successfully recognized) would hopefully be treated like any other embedded external file (e.x like an image) , therefore it would be cached without the need to downloaded it over and over again for each new page on the site.
im making client(browser) and proxy server application in linux and using c/c++....can any one guide me that how proxy server get page from internet and send it to the client (browser)?and how that page will be displayed on my browser??meanz that will be only text...if text then how i can display graphical page....
I'm learning about the HTTP protocol and I'd like to know if there's a tool I can use to input a HTTP request I have created myself that will output the raw response. I've had a look at cURL and wget but they don't seem to have an obvious option to do this. For example:
I installed Nagios on my Ubuntu 10.04 server using apt-get and when I accessed the web console, everything was OK. I made some changes to apache (creating some new virtual sites) and since then Nagios gives me a warning message for HTTP with the message, HTTP WARNING: HTTP/1.1 404 Not Found. The sites that I created are working perfectly. I noticed that the attemps are 4/4. Does this need to be reset or does Nagios automatically reset that once it detects the issue is resolved?
I am trying to write a perl script which will give an interactive session to a user to execute command on the server. I have written a small script to do this :
Code: !/usr/bin/perl -w use strict; use Net::SSH::Perl; my $host = '192.168.1.1'; my $username = 'user'; my $login_passwd = 'test123';
I'm almost positive I've seen a program that runs on Ubuntu that can convert PDF files to HTML but I can't remember where I saw it and I have no idea what the name of it was
It would also be great if I could find a program that can convert PDFs to .odt or .doc or another format that works well with [URL] but thats not something I need right now
I was wondering if it was possible to execute a program from RAM, like having the file data in a bash script variable and then running it. Something like this: ls=`cat ls` $ls So is it possible to run a program without touching the hard disk and without creating tmpfs or ramfs (it would need to be standard user privileges).
Im trying to install a program with bitrock installer but im asked to logon as root or become super user. When trying to logon as root from logon window I get message that "cant authenticate user" Ive tried to find a place in "users and groups" to become superuser but cant find it.
I'm trying to execute a C++ program on PowerPC. But I am facing an error saying: "error while loading shared libraries: libstdc++.so.6: cannot open shared object file: No such file or directory". But a C program gets executed successfully. The programs are cross compiled using PowerPC cross compiler.
I am trying to write a java program and eventually a web app to do the following.1. get the server name, username, password from the user and ssh to the linux box.2. goto a folder, open a script file (the file has different function calls, I need to comment all other function calls and just un-comment the one I want to use)
I am runig a program on a server at my university that has 4 Dual-Core AMD Opteron(tm) Processor 2210 HE and the O.S. is Linux version 2.6.27.25-78.2.56.fc9.x86_64. My program implements Conways Game of Life and it runs using pthreads and openmp. I timed the parrallel part of the program using the getimeofday() function using 1-8 threads. But the timings don't seem right. I get the biggest time using 1 thread(as expected), then the time gets smaller. But the smallest time i get is when i use 4 threads.
Here is an example when i use an array 1000x1000.
Using 1 thread~9,62 sec, Using 2 Threads~4,73 sec, Using 3 ~ 3.64 sec, Using 4~2.99 sec, Using 5 ~4,19 sec, Using 6~3.84, Using 7~3.34, Using 8~3.12.The above timings are when i use pthreads. When i use openmp the timing are smaller but follow the same pattern.I expected that the time would decrease from 1-8 because of the 4 Dual core cpus? I thought that because there are 4 cpus with 2 cores each, 8 threads could run at the same time. Does it have to do with the operating system that the server runs?
Also i tested the same programs on another server that has 7 Dual-Core AMD Opteron(tm) Processor 8214 and runs Linux version 2.6.18-194.3.1.el5. There the timings i get are what i expected. The timings get smaller starting from 1(the biggest) to 8(smallest excecution time).The program implements the Game of Life correct, both using pthreads and openmp, i just cant figure out why the timings are like the example i posted. So in conclusion, my questions are:
1) The number of threads that can run at the same time on a system depends by the cores of the cpus?it depends only by the cpus although each cpu has more than one cores? It depends by all the previous and the Operating System?
2) Does it have to do with the way i divide the 1000x1000 array to the number of threads? But if i did then the openmp code wouldn't give the same pattern of timings?
I'm building a Cluster with 20 small Compaq ipaq PC's as the nodes. I have absolutely no room for any keyboards on this cluster. The PC's require a keyboard to boot, and there are no BIOS settings I can adjust to fix this problem, and no BIOS updates. I have found a small DOS .com program by Compaq called NO_F1.com it's designed to allow the computer to continue to boot without a keyboard. it's only 172 bytes in size. It sets a bit in the CMOS which allows the boot process to continue without a keyboard. It does not permanently set anything, so it needs to run each time the computer starts.
Is there any way I can execute this program very early in the boot process every time the node boots ? I thought about dissembling the program and trying to modify the boot loader, or some other ASM program, the program is only 172 bytes. But thats really over my head. What could I try, I don't know what to do. Also, I have no floppy drive and no CD drive to boot from, only USB or hard drive.
I am currently trying to set up a media PC running Ubuntu in my living room..I plan to be using XMBC to play my music and videos using a Xbox 360 joypad. I have managed to get 'qjoypad' working so on the desktop the controller controls the mouse, I have also made a little script so that when XMBC opens, 'qjoypad' changes its key mappings to a different profile. However when I exit XMBC, I would like it to return to the default profile, is there any way of doing this?
I would like that my java program continues executing when I close the ssh connection, how can I do that? I suppose I have to create a service, but I have no idea how to do it!
I am using RHEL, and trying to execute a c program.I'm able to compile properly and execute until i reach a function getHandle, where the program gives a segmentation fault. Segmentation fault occurs in getHandle().
