【IOS应用源码】调整图片大小长宽的组件.zip资源-CSDN下载

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IOS应用

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#include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <pthread.h> #include <sys/socket.h> #include <netinet/in.h> #include <dirent.h> #include <signal.h> #include <fcntl.h> #include <ctype.h> #include <wait.h> #include <sys/epoll.h> /**************************************************************************************************/ /* DEFINES / #define PORT 8888 #define WEB_ROOT "./web" // // / TYPES / enum method_enum { MULTI_PROG, MULTI_THRD, MULTI_IO }; // // / EXTERN_PROTOTYPES / // // / LOCAL_PROTOTYPES / // // / VARIABLES / int method = MULTI_IO; // // / LOCAL_FUNCTIONS / static char url_decode(const char str); static void log_request(const char method, const char path, int status, const char status_msg); static int send_response(int sock, int status, const char status_msg, const char content_type, const char body, int body_len); static void handle_request(void arg); // // / PUBLIC_FUNCTIONS */ /**************************************************************************************************/ /* * fn static char url_decode(const char str) * brief Parses the URL in the Post. * * param[in] input_int The URL in the Post. * * return the parsesd result / static char url_decode(const char str_in) { char output = malloc(strlen(str_in) + 1); if (!output) return NULL; char dst = output; while (str_in) { if (str_in == '+') { dst++ = ' '; str_in++; } else if (str_in == '%' && isxdigit(str_in[1]) && isxdigit(str_in[2])) { char hex[3] = {str_in[1], str_in[2], '\0'}; dst++ = (char)strtol(hex, NULL, 16); str_in += 3; } else { dst++ = str_in++; } } dst = '\0'; return output; } static void log_request(const char method, const char path, int status, const char status_msg) { printf("[%s] %s -> %d %s\n", method, path, status, status_msg); } /* * fn static void send_response(int sock, int status, const char status_msg, const char content_type, const char body, int body_len) brief Send a response to the browser. * * param[in] sock Client socket. * param[in] status Response status. * param[in] status_msg Meaning of response status. * param[in] content_type Type of body. * param[in] body Data to be send. * param[in] body_len Length of body. * * return the send result / static int send_response(int sock, int status, const char status_msg, const char content_type, const char body, int body_len) { char header[1024]; snprintf(header, sizeof(header), "HTTP/1.1 %d %s\r\n" "Content-Type: %s\r\n" "Content-Length: %d\r\n" "Connection: close\r\n\r\n", status, status_msg, content_type, body_len); size_t result = 0; result = send(sock, header, strlen(header), 0); if (result == -1) { close(sock); return -1; } if (body && body_len > 0) { send(sock, body, body_len, 0); if (result == -1) { close(sock); return -1; } } return 0; } /* * fn static void handle_request(void arg) * brief Handle the request from browser. * * param[in] arg Pointer of the client socket. * * return meaningless / static void handle_request(void arg) { int sock = (int )arg; if(MULTI_IO != method){ free(arg); } char buffer[4096]; size_t bytes_read = recv(sock, buffer, sizeof(buffer) - 1, 0); if (bytes_read <= 0) { close(sock); return NULL; } buffer[bytes_read] = '\0'; char method[16], path[256]; sscanf(buffer, "%s %s", method, path); if (strcmp(method, "GET") == 0) { char filepath[512]; if (strcmp(path, "/") == 0) { strcpy(path, "/Index.html"); } sprintf(filepath, "%s%s", WEB_ROOT, path); FILE file = fopen(filepath, "rb"); if (file) { fseek(file, 0, SEEK_END); long len = ftell(file); fseek(file, 0, SEEK_SET); char content = malloc(len); fread(content, 1, len, file); fclose(file); const char content_type = "text/html"; if (strstr(path, ".css")) { content_type = "text/css"; } else if (strstr(path, ".js")) { content_type = "application/json"; } else if (strstr(path, ".png")) { content_type = "image/png"; } else if (strstr(path, ".jpg")) { content_type = "image/jpeg"; } send_response(sock, 200, "OK", content_type, content, len); free(content); log_request(method, path, 200, "OK"); } else { const char not_found = "<h1>404 Not Found</h1>"; send_response(sock, 404, "Not Found", "text/html", not_found, strlen(not_found)); log_request(method, path, 404, "Not Found"); } } else if (strcmp(method, "POST") == 0) { char content_length_ptr = strstr(buffer, "Content-Length: "); int content_length = 0; if (content_length_ptr) { sscanf(content_length_ptr + 16, "%d", &content_length); } if (content_length <= 0) { const char bad_request = "<h1>400 Bad Request: Missing Content-Length</h1>"; send_response(sock, 400, "Bad Request", "text/html", bad_request, strlen(bad_request)); log_request(method, path, 400, "Bad Request"); close(sock); return NULL; } char post_data = malloc(content_length + 1); if (!post_data) { const char server_error = "<h1>500 Internal Server Error</h1>"; send_response(sock, 500, "Server Error", "text/html", server_error, strlen(server_error)); log_request(method, path, 500, "Server Error"); close(sock); return NULL; } char body_start = strstr(buffer, "\r\n\r\n"); if (body_start) { body_start += 4; memcpy(post_data, body_start, content_length); } else { const char bad_request = "<h1>400 Bad Request: Bad Message Format</h1>"; send_response(sock, 400, "Bad Request", "text/html", bad_request, strlen(bad_request)); log_request(method, path, 400, "Bad Request"); close(sock); return NULL; } post_data[content_length] = '\0'; / post_data : name=z111&email=125253455%40qq.com&message=dasdsasd / if (strcmp(path, "/data/contact.json") == 0) { char name[128] = {0}; char email[128] = {0}; char message[512] = {0}; char token = strtok(post_data, "&"); while (token != NULL) { char eq = strchr(token, '='); if (eq) { eq = '\0'; char key = token; char value = url_decode(eq + 1); if (strcmp(key, "name") == 0) { strncpy(name, value, sizeof(name) - 1); } else if (strcmp(key, "email") == 0) { strncpy(email, value, sizeof(email) - 1); } else if (strcmp(key, "message") == 0) { strncpy(message, value, sizeof(message) - 1); } free(value); } token = strtok(NULL, "&"); } char response[1024]; snprintf(response, sizeof(response), "{" "\"callback\": \"Message received successfully\"," "\"details\": {" "\"name\": %s," "\"email\": %s," "\"message\": %s" "}" "}", name, email, message); send_response(sock, 200, "OK", "application/json", response, strlen(response)); log_request(method, path, 200, "OK"); } else { const char not_implemented = "<h1>501 Not Implemented</h1>"; send_response(sock, 501, "Not Implemented", "text/html", not_implemented, strlen(not_implemented)); log_request(method, path, 501, "Not Implemented"); close(sock); return NULL; } free(post_data); } else { const char not_implemented = "<h1>501 Not Implemented</h1>"; send_response(sock, 501, "Not Implemented", "text/html", not_implemented, strlen(not_implemented)); log_request(method, path, 501, "Not Implemented"); close(sock); return NULL; } close(sock); return NULL; } int main() { /* 当client先终止连接，server向socket中写文件时会触发SIGPIPE信号导致程序退出 / / 此处忽略SIGPIPE信号，在send_response中做处理 / signal(SIGPIPE, SIG_IGN); int server_fd = socket(AF_INET, SOCK_STREAM, 0); struct sockaddr_in addr = { .sin_family = AF_INET, .sin_port = htons(PORT), .sin_addr.s_addr = htonl(INADDR_ANY)}; bind(server_fd, (struct sockaddr )&addr, sizeof(addr)); listen(server_fd, 10); printf("Web server running on port %d\n", PORT); if (MULTI_IO == method) { int epoll_fd = epoll_create1(0); struct epoll_event ev, events[100]; ev.events = EPOLLIN; ev.data.fd = server_fd; epoll_ctl(epoll_fd, EPOLL_CTL_ADD, server_fd, &ev); while (1) { int n = epoll_wait(epoll_fd, events, 100, -1); for (int i = 0; i < n; i++) { if (events[i].data.fd == server_fd) { int client_fd = accept(server_fd, NULL, NULL); ev.events = EPOLLIN | EPOLLET; ev.data.fd = client_fd; epoll_ctl(epoll_fd, EPOLL_CTL_ADD, client_fd, &ev); } else { handle_request(&events[i].data.fd); epoll_ctl(epoll_fd, EPOLL_CTL_DEL, events[i].data.fd, NULL); close(events[i].data.fd); } } } epoll_ctl(epoll_fd, EPOLL_CTL_DEL, server_fd, NULL); }else{ while (1) { int client_fd = accept(server_fd, NULL, NULL); if (client_fd < 0) { perror("accept failed"); continue; } int sock_ptr = malloc(sizeof(int)); if (!sock_ptr) { close(client_fd); continue; } sock_ptr = client_fd; if (MULTI_PROG == method) { pid_t pid = fork(); if (pid == 0) { close(server_fd); handle_request(sock_ptr); exit(0); } else { close(client_fd); waitpid(-1, NULL, WNOHANG); } } else if (MULTI_THRD == method) { pthread_t tid; pthread_create(&tid, NULL, handle_request, sock_ptr); pthread_detach(tid); } } } close(server_fd); return 0; } 如何优化代码使得其具有高并发性

<think>我们正在分析一个用C语言编写的简单HTTP服务器代码，并希望优化其高并发性。当前代码支......

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【IOS应用源码】调整图片大小长宽的组件.zip （3个子文件）

【IOS应用源码】调整图片大小长宽的组件

spuserresizableview.png 63KB

说明.txt 322B

spoletto-SPUserResizableView-d8cb90e.zip 108KB

SPUserResizableView is a user-resizable, user-repositionable UIView subclass. It is modeled after the resizable image view from the Pages iOS app. Any UIView can be provided as the content view for the SPUserResizableView. As the view is respositioned and resized, setFrame: will be called on the content view accordingly.

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