├── 404.html ├── LICENSE ├── RASPBERRY.md ├── README.md ├── install.sh ├── lexiserver ├── lexiserver-arm64 ├── lexiserver.conf └── src ├── lexiserver.1 ├── lexiserver.c └── lexiserver.conf.5 /404.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 404: Not Found 5 | 6 | 7 | 8 |

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10 | Lexiserver 1.0.2 11 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /RASPBERRY.md: -------------------------------------------------------------------------------- 1 | ## RASPBERRY USERS 2 | 3 | run ./lexiserver-arm64 4 | 5 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # LEXISERVER 2 | A Simple Webserver written in C for Educational Purposes. 3 | 4 | ## INSTALL 5 | run (as sudo/root) install.sh (e.g: sudo bash install.sh) this will create /opt/lexiserver/ and move 6 | all the files there. 7 | 8 | ### Raspberri Pi Users 9 | 10 | run lexiserver-arm64 instead 11 | 12 | 13 | ## UNINSTALL 14 | remove the /opt/lexiserver directory (e.g: sudo rm -rf /opt/lexiserver/) 15 | 16 | ## STARTING AND SERVING DOCUMENTS: 17 | 18 | The important files are: 19 | - lexiserver (the server binary) 20 | - lexiserver.conf (the config file for the server) 21 | 22 | Before starting the server, edit the config to change the WEB_ROOT to a directory that you like. 23 | By default, it looks for html documents inside /tmp/www/. You may need to create this directory 24 | if you don't have it (you likely don't have it since most webservers use /var/www/html/) 25 | 26 | To start the server, run ./lexiserver 27 | 28 | If the client doesn't request any page, ej you hit localhost:port 29 | it will serve index.html in /tmp/www or whatever directory you decided to use for your experiment. 30 | 31 | Stopping the server: 32 | 33 | You can kill the PID (Process ID) to end serving documents 34 | ```ps aux | grep lexiserver``` ```kill ``` 35 | 36 | ## WARNING 37 | This is a webserver for educational purposes. Do not expose this to the internet unless you know 38 | exactly what you're doing. 39 | 40 | ## TO DO: 41 | - More Error Pages (only handles 404 at the moment) 42 | - start, stop, restart arguments 43 | 44 | ## Compile your own version 45 | 46 | Inside the src directory you will find the current version of lexiserver.c 47 | compile with gcc: ```gcc lexiserver.c -o lexiserver``` 48 | move the compiled version to /opt/lexiserver 49 | 50 | The binary has to be alongside lexiserver.conf in order to work properly. If the config 51 | is not present, it will assume defaults anyway. 52 | 53 | ## OTHER NOTES 54 | This is a recreational project. Just for fun. Not intended to be serious or to be ran in production. 55 | Bugs will be there, things will not make much sense. Feel free to fork the project, fix whatever 56 | you think you can fix, and send me a merge request. 57 | 58 | To fork the project: 59 | 60 | Fork https://github.com/alexiarstein/simple-webserver 61 | 62 | ## Documentation and info 63 | 64 | [alexia.lat/docs/lexiserver](https://alexia.lat/docs/lexiserver) 65 | 66 | I hope you enjoy this little project and if you have any doubts you can write me on discord at 67 | https://lexi.lat > mis links > discord 68 | 69 | Goodbye! 70 | -------------------------------------------------------------------------------- /install.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | # Lexiserver 1.0 - Installation Script 4 | # Author: Alexia Michelle 5 | 6 | # Check if the script is being run as root 7 | if [ "$(whoami)" != "root" ]; then 8 | echo "Please run this script as root (sudo bash install.sh)" 9 | echo "Error: Insufficient permissions to create /opt/lexiserver" 10 | exit 1 11 | else 12 | echo "Welcome to Lexiserver 1.0 Installation" 13 | echo "----------------------------------------" 14 | echo "This script will install Lexiserver to /opt/lexiserver" 15 | 16 | # Prompt user for confirmation 17 | read -p "Continue with the installation? (Y/N): " choice 18 | 19 | case $choice in 20 | [YySs]) 21 | echo "Installing Lexiserver..." 22 | # Create directory if it doesn't exist 23 | sudo mkdir -p /opt/lexiserver || { echo "Error creating directory /opt/lexiserver"; exit 1; } 24 | 25 | # Copy files to installation directory 26 | sudo cp -r * /opt/lexiserver/ || { echo "Error copying files to /opt/lexiserver"; exit 1; } 27 | 28 | # Append system information to 404.html 29 | sysn=$(head -n 4 /etc/os-release | grep -v "PRETTY" | grep NAME= | awk -F '=' '{print $2}' | sed 's/"//g') 30 | sysv=$(head -n 4 /etc/os-release | grep VERSION= | awk -F '=' '{print $2}' | sed 's/"//g') 31 | echo "$sysn $sysv" >> /opt/lexiserver/404.html || { echo "Error updating 404.html"; exit 1; } 32 | echo -e "\n" >> /opt/lexiserver/404.html 33 | echo "Installation complete!" 34 | echo "To uninstall, remove /opt/lexiserver" 35 | ;; 36 | [Nn]) 37 | echo "Installation aborted" 38 | ;; 39 | *) 40 | echo "Invalid choice. Installation aborted." 41 | ;; 42 | esac 43 | fi 44 | 45 | -------------------------------------------------------------------------------- /lexiserver: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/alexiarstein/simple-webserver/a485aa596906f37f06a98e7a64406701daa5a92f/lexiserver -------------------------------------------------------------------------------- /lexiserver-arm64: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/alexiarstein/simple-webserver/a485aa596906f37f06a98e7a64406701daa5a92f/lexiserver-arm64 -------------------------------------------------------------------------------- /lexiserver.conf: -------------------------------------------------------------------------------- 1 | # LEXISERVER CONFIGURATION FILE 2 | 3 | # [EN] Notice this file has to be right next to the lexiserver compiled file 4 | # Or your changes will not work and it will assume defaults instead. 5 | 6 | # [ES] Este archivo de configuración necesita estar junto con el archivo compilado 7 | # lexiserver o sinó no funcionarán tus cambios y asumirá los defaults. 8 | 9 | # Port where you want your server to listen on (e.g: 80, 8080, 8000, or other) 10 | LPORT=1337 11 | 12 | # The Web Root: Where you want to store your documents and files that are going 13 | # To be served. 14 | WEB_ROOT=/tmp/www/ 15 | 16 | # Buffer Size: It determines how much data can be read from or written to a file or socket at a time. 17 | # This is expressed in byres. A buffer size of 2048 means a socket of 2KB. 18 | # You can leave this as it is, or shrink it down to 1024. 19 | LBUFSIZE=2048 20 | 21 | # No need to edit this setting 22 | LEXISERVER=Lexiserver-1.0.3 23 | 24 | # Were you expecting more? Sorry to disappoint :P 25 | # Alexia. 26 | -------------------------------------------------------------------------------- /src/lexiserver.1: -------------------------------------------------------------------------------- 1 | LEXISERVER(1) User Commands LEXISERVER(1) 2 | 3 | NAME 4 | lexiserver - A Simple Webserver written in C for Educational Purposes 5 | 6 | SYNOPSIS 7 | lexiserver 8 | 9 | DESCRIPTION 10 | lexiserver is a simple web server program written in C for educational purposes. 11 | 12 | INSTALLATION 13 | Run install.sh (e.g., sudo bash install.sh) to create /opt/lexiserver/ and move all the files there. 14 | 15 | For Raspberry Pi users, run lexiserver-arm64 instead. 16 | 17 | UNINSTALLATION 18 | Remove the /opt/lexiserver directory (e.g., sudo rm -rf /opt/lexiserver/). 19 | 20 | STARTING AND SERVING DOCUMENTS 21 | Before starting the server, edit the config file lexiserver.conf to change the WEB_ROOT directory. 22 | 23 | By default, the server looks for HTML documents inside /tmp/www/. You may need to create this directory. 24 | 25 | To start the server, run lexiserver. 26 | 27 | If the client doesn't request any page (e.g., hitting localhost:port), it will serve index.html in /tmp/www or the specified directory. 28 | 29 | To stop the server, kill the PID (Process ID) by running ps aux | grep lexiserver and then kill . 30 | 31 | WARNING 32 | This web server is intended for educational purposes. Do not expose it to the internet unless you know what you're doing. 33 | 34 | TO DO 35 | - Implement more error pages (currently only handles 404). 36 | - Add start, stop, restart arguments. 37 | 38 | COMPILING YOUR OWN VERSION 39 | Compile lexiserver.c with gcc: gcc lexiserver.c -o lexiserver, and move the compiled version to /opt/lexiserver. 40 | 41 | The binary should be alongside lexiserver.conf to work properly. If the config is not present, it will assume defaults. 42 | 43 | OTHER NOTES 44 | This is a recreational project, not intended for production use. Bugs may exist. Feel free to fork the project, fix bugs, and send merge requests. 45 | 46 | Fork the project at https://github.com/alexiarstein/simple-webserver. 47 | 48 | DOCUMENTATION AND INFO 49 | Visit [alexia.lat/docs/lexiserver](https://alexia.lat/docs/lexiserver) for documentation and more information. 50 | 51 | For questions or doubts, contact the author via Discord at https://lexi.lat > mis links > discord. 52 | 53 | AUTHOR 54 | Written by Alexia Michelle . 55 | 56 | Goodbye! 57 | 58 | 59 | -------------------------------------------------------------------------------- /src/lexiserver.c: -------------------------------------------------------------------------------- 1 | // Lexiserver - A small webserver for tinkering and educational purposes written in C 2 | // Author: Alexia Michelle 8 | #include 9 | #include 10 | #include 11 | #include 12 | #include 13 | #include 14 | #include 15 | 16 | #define CONFIG_FILE "lexiserver.conf" 17 | #define BUFFER_SIZE 1024 // solo para los errores y si LBUFSIZE no esta definido en la config. No tiene ningun efecto 18 | 19 | // SI NO EDITARON LA CONFIG, TOMA ESTOS VALORES POR DEFECTO. 20 | #define DEFAULT_LPORT 1337 21 | #define DEFAULT_WEB_ROOT "/tmp/www" 22 | #define DEFAULT_LBUFSIZE 1024 23 | #define DEFAULT_LEXISERVER "lexiserver-1.0.2" // No tiene un uso concreto ahora. Es mas un boilerplate que otra cosa en este momento. 24 | 25 | // DEFINE LBUFSIZE COMO UNA CONSTANTE GLOBAL 26 | const int LBUFSIZE = BUFFER_SIZE; 27 | 28 | void parse_config_file(int *LPORT, char *WEB_ROOT, int *LBUFSIZE, char *LEXISERVER) { 29 | FILE *file = fopen(CONFIG_FILE, "r"); 30 | if (file == NULL) { 31 | perror("ERROR OPENING CONFIG. FILE"); // SI NO HAY lexiserver.conf en el mismo lugar que el binario, putea. 32 | exit(EXIT_FAILURE); 33 | } 34 | 35 | char line[256]; 36 | while (fgets(line, sizeof(line), file)) { 37 | if (line[0] == '#' || line[0] == '\n') 38 | continue; 39 | 40 | char key[64], value[256]; 41 | if (sscanf(line, "%63[^=]=%255[^\n]", key, value) == 2) { 42 | if (strcmp(key, "LPORT") == 0) 43 | *LPORT = atoi(value); 44 | else if (strcmp(key, "WEB_ROOT") == 0) 45 | strcpy(WEB_ROOT, value); 46 | else if (strcmp(key, "LBUFSIZE") == 0) 47 | *LBUFSIZE = atoi(value); 48 | else if (strcmp(key, "LEXISERVER") == 0) 49 | strcpy(LEXISERVER, value); 50 | } 51 | } 52 | 53 | fclose(file); 54 | } 55 | 56 | void handle_request(int newsockfd, struct sockaddr_in client_addr, const char *WEB_ROOT, int LBUFSIZE); 57 | void send_file(int sockfd, const char *filepath, int LBUFSIZE); 58 | void send_error(int sockfd, int status_code, const char *error_page); 59 | 60 | int main() { 61 | int LPORT, LBUFSIZE; 62 | char WEB_ROOT[256], LEXISERVER[256]; 63 | parse_config_file(&LPORT, WEB_ROOT, &LBUFSIZE, LEXISERVER); 64 | // string con string, integrer con integrer y todos felices 65 | printf("* Configuration Loaded:\n* PORT=%d\n* WEB_ROOT=%s\n* BUFFER SIZE=%d\n* LEXISERVER=%s\n", LPORT, WEB_ROOT, LBUFSIZE, LEXISERVER); 66 | 67 | char buffer[LBUFSIZE]; 68 | int sockfd = socket(AF_INET, SOCK_STREAM, 0); 69 | if (sockfd == -1) { 70 | perror("webserver (socket)"); 71 | return 1; 72 | } 73 | printf("* Socket Created [ OK ]\n* Server Listening\n* Lexiserver 1.0.2 https://alexia.lat/docs/lexiserver\n"); 74 | 75 | struct sockaddr_in host_addr; 76 | int host_addrlen = sizeof(host_addr); 77 | 78 | host_addr.sin_family = AF_INET; 79 | host_addr.sin_port = htons(LPORT); 80 | host_addr.sin_addr.s_addr = htonl(INADDR_ANY); 81 | 82 | struct sockaddr_in client_addr; 83 | int client_addrlen = sizeof(client_addr); 84 | 85 | if (bind(sockfd, (struct sockaddr *)&host_addr, host_addrlen) != 0) { 86 | perror("webserver (bind)"); 87 | return 1; 88 | } 89 | 90 | printf("* Bound Socket to Address [ OK ]\n"); 91 | 92 | if (listen(sockfd, SOMAXCONN) != 0) { 93 | perror("webserver (listen)"); 94 | return 1; 95 | } 96 | 97 | printf("* Server Listening Connections on Port %d\n", LPORT); 98 | 99 | for (;;) { 100 | int newsockfd = accept(sockfd, (struct sockaddr *)&host_addr, 101 | (socklen_t *)&host_addrlen); 102 | if (newsockfd < 0) { 103 | perror("webserver (accept)"); 104 | continue; 105 | } 106 | printf("connection accepted\n"); 107 | 108 | handle_request(newsockfd, client_addr, WEB_ROOT, LBUFSIZE); 109 | } 110 | 111 | return 0; 112 | } 113 | 114 | void handle_request(int newsockfd, struct sockaddr_in client_addr, const char *WEB_ROOT, int LBUFSIZE) { 115 | char buffer[LBUFSIZE]; 116 | int valread = read(newsockfd, buffer, LBUFSIZE); 117 | if (valread < 0) { 118 | perror("webserver (read)"); 119 | close(newsockfd); 120 | return; 121 | } 122 | 123 | char method[LBUFSIZE], uri[LBUFSIZE], version[LBUFSIZE]; 124 | sscanf(buffer, "%s %s %s", method, uri, version); 125 | printf("[%s:%u] %s %s %s\n", inet_ntoa(client_addr.sin_addr), 126 | ntohs(client_addr.sin_port), method, version, uri); 127 | 128 | char filepath[LBUFSIZE]; 129 | snprintf(filepath, sizeof(filepath), "%s%s", WEB_ROOT, uri); 130 | if (strlen(uri) == 1 && uri[0] == '/') { 131 | snprintf(filepath, sizeof(filepath), "%s/index.html", WEB_ROOT); 132 | } 133 | 134 | int filefd = open(filepath, O_RDONLY); 135 | if (filefd < 0) { 136 | perror("webserver (open)"); 137 | send_error(newsockfd, 404, "404.html"); 138 | close(newsockfd); 139 | return; 140 | } 141 | 142 | send_file(newsockfd, filepath, LBUFSIZE); 143 | close(newsockfd); 144 | } 145 | 146 | void send_file(int sockfd, const char *filepath, int LBUFSIZE) { 147 | char buffer[LBUFSIZE]; 148 | ssize_t file_size; 149 | int valwrite; 150 | 151 | int filefd = open(filepath, O_RDONLY); 152 | if (filefd < 0) { 153 | perror("webserver (open file)"); 154 | return; 155 | } 156 | 157 | char response_headers[] = "HTTP/1.0 200 OK\r\n" 158 | "Server: Lexiserver 1.0.2\r\n" 159 | "Content-type: text/html\r\n\r\n"; 160 | valwrite = write(sockfd, response_headers, strlen(response_headers)); 161 | if (valwrite < 0) { 162 | perror("webserver (write headers)"); 163 | close(filefd); 164 | return; 165 | } 166 | 167 | while ((file_size = read(filefd, buffer, LBUFSIZE)) > 0) { 168 | valwrite = write(sockfd, buffer, file_size); 169 | if (valwrite < 0) { 170 | perror("webserver (write file)"); 171 | close(filefd); 172 | return; 173 | } 174 | } 175 | 176 | close(filefd); 177 | } 178 | 179 | void send_error(int sockfd, int status_code, const char *error_page) { 180 | char error_message[256]; 181 | snprintf(error_message, sizeof(error_message), "HTTP/1.0 %d ERROR\r\n\r\n", status_code); 182 | write(sockfd, error_message, strlen(error_message)); 183 | 184 | char buffer[BUFFER_SIZE]; 185 | size_t bytes_read; 186 | 187 | FILE *file = fopen(error_page, "r"); 188 | if (file == NULL) { 189 | perror("ERROR OPENING ERROR FILE"); 190 | return; 191 | } 192 | 193 | while ((bytes_read = fread(buffer, 1, sizeof(buffer), file)) > 0) { 194 | if (write(sockfd, buffer, bytes_read) < 0) { 195 | perror("ERROR SENDING ERROR FILE TO CLIENT"); 196 | fclose(file); 197 | return; 198 | } 199 | } 200 | 201 | fclose(file); 202 | } 203 | -------------------------------------------------------------------------------- /src/lexiserver.conf.5: -------------------------------------------------------------------------------- 1 | LEXISERVER.CONF(5) File Formats LEXISERVER.CONF(5) 2 | 3 | NAME 4 | lexiserver.conf - Lexiserver Configuration File 5 | 6 | SYNOPSIS 7 | /opt/lexiserver/lexiserver.conf 8 | 9 | DESCRIPTION 10 | The lexiserver.conf file is used to configure the behavior of the Lexiserver web server. 11 | 12 | CONFIGURATION OPTIONS 13 | LPORT Port where the server listens for incoming connections. Default is 1337. 14 | 15 | WEB_ROOT Directory where documents and files to be served are stored. Default is /tmp/www/. 16 | 17 | LBUFSIZE Size of the buffer used for reading from or writing to files or sockets, in bytes. 18 | Default is 2048. 19 | 20 | LEXISERVER 21 | Name of the Lexiserver program. No need to edit this setting. 22 | 23 | EXAMPLE 24 | # Example configuration file for Lexiserver 25 | LPORT=8080 26 | WEB_ROOT=/var/www/html/ 27 | LBUFSIZE=1024 28 | LEXISERVER=Lexiserver-1.0.3 29 | 30 | FILES 31 | /opt/lexiserver/lexiserver.conf 32 | 33 | SEE ALSO 34 | lexiserver(1) 35 | 36 | AUTHOR 37 | Written by Alexia Michelle . 38 | 39 | COPYRIGHT 40 | This is free software: you are free to change and redistribute it. 41 | There is NO WARRANTY, to the extent permitted by law. 42 | 43 | Goodbye! 44 | 45 | 46 | --------------------------------------------------------------------------------