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This commit is contained in:
Gaetan Longree
2018-05-11 15:51:48 +02:00
commit 4411d5800e
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SOURCE/CONTAINER/WebServer/Dockerfile Normal file
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FROM alpine:latest
RUN mkdir /service
COPY runnableService /service
COPY index.html /service
WORKDIR /service
CMD sleep 1 && ./runnableService "$(hostname -i)"

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SOURCE/CONTAINER/WebServer/compile.sh Normal file
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#!/bin/bash
docker run --rm -it -v "${PWD}":/usr/src/build -w /usr/src/build cetic/compiler g++ -std=c++11 -static -o runnableService *.cpp

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SOURCE/CONTAINER/WebServer/create_container.sh Normal file
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#!/bin/bash
docker build -t cetic/webserver .

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SOURCE/CONTAINER/WebServer/index.html Normal file
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>CETIC Internship Unikernel Web Page</title>
<link href="https://fonts.googleapis.com/css?family=Ubuntu:500,300" rel="stylesheet" type="text/css">
</head>
<body>
<h1 style="font-family: Arial, sans-serif">
CETIC Internship Unikernel Web Page
</h1>
<hr />
<p>This is the first web server spawn from a unikernel during the CETIC Intership 2017-18</p>
</body>
</html>

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SOURCE/CONTAINER/WebServer/run_service.sh Normal file
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#!/bin/bash
docker run --rm -d cetic/webserver

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SOURCE/CONTAINER/WebServer/start.sh Normal file
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#!/bin/bash
# Building binary from C++ code (statically linking libraries)
docker run --rm -it -v "${PWD}":/usr/src/build -w /usr/src/build cetic/compiler g++ -std=c++11 -static -o runnableService *.cpp
# Building the container (expecting the Dockerfile to be present)
docker build -t cetic/webserver .
# Launching the service in a Docker container
docker run --rm -d cetic/webserver

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SOURCE/CONTAINER/WebServer/webServer.cpp Normal file
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/*
* This code is adapted from the IncludeOS Acorn web server example.
*/
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string>
#include <cstring>
#include <fstream>
#define SERVER_PORT 80
#define BUFFER_SIZE 2048
bool isIndexRequested(char receiveBuffer[]) {
// if only / is requested
if(receiveBuffer[4] == '/' && receiveBuffer[5] == ' ')
return true;
// if only /index.html is requested
char request[25];
memcpy(request, receiveBuffer, 24);
request[25] = '\0';
char *output = NULL;
output = strstr(request," /index.html ");
if(output)
return true;
return false;
}
int main(int argc, char *argv[])
{
// define address and socket variables
struct sockaddr_in serverAddress;
int serverSocket;
int clientSocket;
struct sockaddr_in clientAddress;
socklen_t clientAddressLength = sizeof(clientAddress);
int bytesReceivedLength;
char receiveBuffer[BUFFER_SIZE];
// Retrieve the HTML page from the disk
std::ifstream file("index.html", std::ios::binary | std::ios::ate);
std::streamsize indexLength = file.tellg();
file.seekg(0, std::ios::beg);
char indexArray[indexLength];
file.read(indexArray, indexLength);
// creating error message
std::string error = "HTTP/1.1 404 Not Found\r\nContent-Type: text/html\r\n\r\n<html><body>Page not found</body></html>\r\n";
int errorLength = error.length();
// declaring character array
char errorArray[errorLength+1];
strcpy(errorArray, error.c_str());
// creating TCP socket
if ((serverSocket = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("cannot create socket");
return 0;
}
// defining server address properties
memset((void *)&serverAddress, 0, sizeof(serverAddress));
serverAddress.sin_family = AF_INET;
serverAddress.sin_addr.s_addr = inet_addr(argv[1]);
//serverAddress.sin_addr.s_addr = htonl(INADDR_ANY);
serverAddress.sin_port = htons(SERVER_PORT);
// binding to UDP socket
if (bind(serverSocket, (struct sockaddr *)&serverAddress, sizeof(serverAddress)) < 0) {
perror("bind failed");
return 0;
}
// set the socket for listening (queue backlog of 5)
if (listen(serverSocket, 5) < 0) {
perror("listen failed");
return 0;
}
printf("Service IP address is %s on port %d\n", inet_ntoa(serverAddress.sin_addr), ntohs(serverAddress.sin_port));
for (;;) {
clientSocket = accept(serverSocket, (struct sockaddr *)&clientAddress, &clientAddressLength);
bytesReceivedLength = read(clientSocket, receiveBuffer, BUFFER_SIZE);
printf("####### INCOMMING REQUEST #######\n");
printf("Received a connection from: %s port %d\n", inet_ntoa(clientAddress.sin_addr), ntohs(clientAddress.sin_port));
printf("received %d bytes\n", bytesReceivedLength);
if (bytesReceivedLength > 0) {
// TODO respond only to GET and / or /index.html
if(receiveBuffer[0] == 'G' && isIndexRequested(receiveBuffer) ) { //request is not a GET
// debug output
printf("%s", receiveBuffer);
// send reply
//printf("%s", indexArray);
int nbytes = write(clientSocket, indexArray, indexLength);
printf("%d sent to client\n", nbytes);
} else {
printf("%s", receiveBuffer);
int nbytes = write(clientSocket, errorArray, (errorLength+1));
printf("%d bytes sent to client\n", nbytes);
}
printf("#################################\n");
shutdown(clientSocket, 2);
}
}
}