int
Query_WordLookup(char *imageName, char *word, char *result, int result_maxsize)
{
int sockfd = ConnectToImageServer(imageName);
if (sockfd < 0) {
return -1;
}
/*
* We now have an open TCP connection to the server.
* Send query and get response.
*/
/* You need to implement this - Note the buffer size is likely wrong. */
char buf[1024*1024];
int nbytes = read(sockfd, buf, sizeof(buf));
if (nbytes > 0) {
if (nbytes > result_maxsize) {
nbytes = result_maxsize;
}
}
memcpy(result, buf, nbytes);
close(sockfd);
return nbytes;
}
int
Query_WordLookup(char *imageName, void *word, char **result)
{
int sockfd = ConnectToImageServer(imageName);
if (sockfd < 0) {
return -1;
}
/*
* We now have an open TCP connection to the server.
* Send query and get response.
*/
/* Write the query */
// Get the length of the query
int length;
memcpy(&length,word,sizeof(int));
// Send the query message
int totalBytesWritten = 0;
while(totalBytesWritten < sizeof(int)){
char *buff = word + totalBytesWritten;
int bytesToWrite = length + sizeof(int) - totalBytesWritten;
int nbytes = write(sockfd,buff,bytesToWrite);
if(nbytes < 0){
perror("write");
return -1;
}
totalBytesWritten += nbytes;
}
/* Read the response */
// Read the length of the response
char responseLength[sizeof(int)];
unsigned int totalBytesRead = 0;
while(totalBytesRead < sizeof(int)){
char * buff = responseLength + totalBytesRead;
unsigned int bytesToRead = sizeof(int) - totalBytesRead;
int nbytes = read(sockfd,buff,bytesToRead);
if(nbytes < 0){
perror("read");
return -1;
}
totalBytesRead += nbytes;
}
// Get the response length as an integer
int len;
memcpy(&len,responseLength,sizeof(int));
// Read the response
char *response = malloc(len+1);
totalBytesRead = 0;
while(totalBytesRead < len){
char *buff = response + totalBytesRead;
int bytesToRead = len - totalBytesRead;
int nbytes = read(sockfd,buff,bytesToRead);
if(nbytes < 0)return -1;
totalBytesRead += nbytes;
}
close(sockfd);
// Append the null terminator
response[len] = 0;
*result = response;
return totalBytesRead;
}
