proxyWord下载.docx

1、typedef struct int serverPort; char methodMAXLINE,urlMAXLINE; char versionMAXLINE,hostnameMAXLINE,pathMAXLINE; requestHeader;struct cacheSet char hostnameMAXLINE; / hostname char pathMAXLINE; / path struct cacheSet* next; / pointer to next cache set char* buffer; / buffer pointer int time; / time st

2、amp int len; / buffer size;/*-*/void *doit（void*）;struct cacheSet *cacheSearch（char *hostname, char *path）;struct cacheSet *cacheFindLRU（int len）;int cacheAdd（char *hostname, char *path, char *buf, int len）;int globalTime = 0;struct cacheSet* cache;sem_t mutex_time;int readcnt = 0;sem_t mutex, w;sem

3、_t mutexHostName;/*-*/int main （int argc, char *argv ） int fd; if（fd=open（output.txt,O_RDWR,0）0） dup2（fd,1）; pthread_t tid; struct sockaddr_in clientaddr; int listenfd; int *connfdp; int port; socklen_t clientLen = sizeof（struct sockaddr_in）; / initilize cache cache = malloc（sizeof（struct cacheSet）;

4、 if（cache = NULL） fprintf（stderr, fail to malloc cache.n）; exit（1）; strcpy（cache-hostname, path, cache-next = NULL;buffer = NULL;time = 0;len = 0; / initilize semaphore sem_init（&mutex_time,0,1）; sem_init（&mutex,0,1）;w,0,1）;mutexHostName,0,1）; /* exam the portnumber */ if （argc != 2）No portnumber!n

5、/* ignore the SIGPIPE*/ Signal（SIGPIPE,SIG_IGN）; port = atoi（argv1）; if （listenfd = open_listenfd（port） 0） fprintf（stderr,fail to open listenfd! exit（-1）; /* create a new thread */ while（1） if （connfdp = （int *） malloc（sizeof（int）= NULL）fail to get space from heap! continue; if （*connfdp = accept（li

6、stenfd,（SA *）&clientaddr,&clientLen） url,http:/,7） /* surpass */ char *first=header-url+7; char *as=header-url; while（*first） *as=*first; as+; first+; *as=0 /* whether path is the root directory */（ptr = strchr（header-url,/） strcpy（header-path,/ /* get the path*/ elsepath,ptr）; /* get the hostname *

7、/ length = strlen（header-url）; for（i=0;iurli = ） break;: header-hostnamei = header-urli;hostnamei = /* get port number */ if （header-） i+;url+i）; for（j=0;j+,i+） portj = header- portj = serverPort = atoi（port）; * serve the single clientvoid *doit（void *vargp） rio_t clientRio,serverRio; int connfd = *

8、（int *）vargp; char bufMAXLINE, recBufMAX_OBJECT_SIZE; requestHeader header; int connfd2server; struct cacheSet* set; int lenSum = 0; free（vargp）; tid = pthread_self（）; if （pthread_detach（tid） !fail to detach thread:%dn,（int） tid）; close（connfd）; pthread_exit（NULL）; /* read the first line of header i

9、n the request*/ rio_readinitb（&clientRio,connfd）; if （rio_readlineb（&clientRio,buf,MAXLINE）0）fail to read the first line from the request! dbg_printf（buf=%sn,buf）; sscanf（buf,%s %s %s,header.method,header.url,header.version）; dbg_printf（method=%s,url=%s,version=%sn /* only surpport GET method*/ if （strcmp（header.method,GET）we cannot forward %s method!,header.method）; if （parse_uri（&header,&clientRio）fail to parse the header）!serverPort=%d,hostname=%sn,header.serverPort,header.hostnam