/*
* get_file() - get a file from the server accessible via the given socket
* fd, and save it according to the save_name
*/
void get_file(int fd, char *get_name, char *save_name)
{
/* create get request */
uint32_t request_size = strlen(get_name) + strlen("GET\n");
char get[request_size];
bzero(get, request_size);
strcpy(get, "GET\n");
strcat(get, get_name);
/* send size of request */
Send_Int(fd, request_size);
/* send request */
Send(fd, get, request_size);
/* get size of header */
uint32_t header_size = Receive_Int(fd);
/* get header */
char header_buf[header_size];
bzero(header_buf, header_size);
/* get response */
if (Receive(fd, header_buf, header_size) != 0)
die("Get_file", "Connection closed while reading header");
/* check for OK */
char * iter_buf = strtok(header_buf, "\n");
if (strcmp(iter_buf, "OK"))
die("Get_file server response error", iter_buf);
/* check to make sure correct file was sent */
iter_buf = strtok(NULL, "\n");
if (strcmp(iter_buf, get_name))
die("Get_file file error", "Incorrect file retrieved");
/* check file size */
char * t;
iter_buf = strtok(NULL, "\n");
int file_size = strtol(iter_buf, &t, 10);
/* create new buffer for file content */
char file_buf[file_size];
bzero(file_buf, file_size);
if (Receive(fd, file_buf, file_size) != 0)
die("Get_file", "Connection closed while reading file");
FILE * fp = fopen(save_name, "wb");
fwrite(file_buf, sizeof(file_buf), 1, fp);
fclose(fp);
}
/*
Description: Setup state, Adjusting Day
State from Diagram: S10
*/
state do_SET_DAY()
{
GotoLCD_Location(1,1);
Send_String("Set Day:");
GotoLCD_Location(1,2);
Send_Int(time[2]);
if (bu==1)
{
clear_display();
bu=0;
if (time[2]<=30)
time[2]++;
else time[2]=1;
}
if (bd==1)
{
bd=0;
clear_display();
if (time[2]>=2)
time[2]--;
else time[2]=31;
}
if (bs==1)
{
clear_display();
bs=0;
issetup=0;
return DISP_TEMP;
}
if (bf==1)
{
clear_display();
bf=0;
return SET_MONTH;
}
return SET_DAY;
}
/*
Description: Setup state, Adjusting minute
State from Diagram: S09
*/
state do_SET_MIN()
{
GotoLCD_Location(1,1);
Send_String("Set Minute:");
GotoLCD_Location(1,2);
Send_Int(time[4]);
if (bu==1)
{
clear_display();
bu=0;
if (time[4]<=58)
time[4]++;
else time[4]=0;
}
if (bd==1)
{
bd=0;
clear_display();
if (time[4]>=1)
time[4]--;
else time[4]=59;
}
if (bs==1)
{
clear_display();
bs=0;
issetup=0;
return DISP_TEMP;
}
if (bf==1)
{
clear_display();
bf=0;
return SET_DAY;
}
return SET_MIN;
}
/*
Description: First Setup state, Adjusting hour
State from Diagram: S08
*/
state do_SET_HOUR()
{
GotoLCD_Location(1,1);
Send_String("Set Hour:");
GotoLCD_Location(1,2);
Send_Int(time[3]);
if (bu==1)
{
clear_display();
bu=0;
if (time[3]<=22)
time[3]++;
else time[3]=0;
}
if (bd==1)
{
bd=0;
clear_display();
if (time[3]>=1)
time[3]--;
else time[3]=23;
}
if (bs==1)
{
clear_display();
bs=0;
issetup=0;
return DISP_TEMP;
}
if (bf==1)
{
clear_display();
bf=0;
return SET_MIN;
}
return SET_HOUR;
}
/*
Description: Setup state, Adjusting Year
State from Diagram: S12
*/
state do_SET_YEAR()
{
GotoLCD_Location(1,1);
Send_String("Set Year:");
GotoLCD_Location(1,2);
Send_Int(time[0]);
if (bu==1)
{
clear_display();
bu=0;
if (time[0]<=99)
time[0]++;
else time[0]=14;
}
if (bd==1)
{
bd=0;
clear_display();
if (time[0]>=15)
time[0]--;
else time[0]=99;
}
if (bs==1)
{
clear_display();
bs=0;
issetup=0;
return DISP_TEMP;
}
if (bf==1)
{
clear_display();
bf=0;
return DISP_SETUP_MSG;
}
return SET_YEAR;
}
/*
Description: Setup state, Adjusting Month
State from Diagram: S11
*/
state do_SET_MONTH()
{
GotoLCD_Location(1,1);
Send_String("Set Month:");
GotoLCD_Location(1,2);
Send_Int(time[1]);
if (bu==1)
{
clear_display();
bu=0;
if (time[1]<=11)
time[1]++;
else time[1]=1;
}
if (bd==1)
{
bd=0;
clear_display();
if (time[1]>=2)
time[1]--;
else time[1]=12;
}
if (bs==1)
{
clear_display();
bs=0;
issetup=0;
return DISP_TEMP;
}
if (bf==1)
{
clear_display();
bf=0;
return SET_YEAR;
}
return SET_MONTH;
}
/*
Description: Home state, displaying date, time and temperature
State from Diagram: S02
*/
state do_DISP_TEMP()
{
GotoLCD_Location(1,1);
if (time[3]<=9)
{
Send_String("0");
Send_Int(time[3]);
}
else
{
Send_Int(time[3]);
}
Send_String(":");
if (time[4]<=9)
{
Send_String("0");
Send_Int(time[4]);
}
else
{
Send_Int(time[4]);
}
Send_String(" ");
Send_Int(time[2]);
Send_String(".");
Send_Int(time[1]);
Send_String(".");
Send_Int(time[0]);
GotoLCD_Location(1,2);
Send_String("Temp.: ");
Send_Double(weather.temp,2,1);
Send_String("C");
if(my_state != DISP_TEMP) //if any interrupt has changed the destination state, shut up.
return my_state;
if (bd==1)
{
clear_display();
bd=0;
return DISP_HUM;
}
if (bu==1)
{
clear_display();
bu=0;
return DISP_LIGHT;
}
if (bs==1)
{
clear_display();
bs=0;
issetup=1;
return SET_HOUR;
}
if (bf==1)
{
clear_display();
bf=0;
isforecast =1;
timer5s = 0;
return DISP_FC;
}
return DISP_TEMP;
}
/*
Description: Humidity state, displaying date, time and humidity
State from Diagram: S04
*/
state do_DISP_HUM()
{
GotoLCD_Location(1,1);
if (time[3]<=9)
{
Send_String("0");
Send_Int(time[3]);
}
else
{
Send_Int(time[3]);
}
Send_String(":");
if (time[4]<=9)
{
Send_String("0");
Send_Int(time[4]);
}
else
{
Send_Int(time[4]);
}
Send_String(" ");
Send_Int(time[2]);
Send_String(".");
Send_Int(time[1]);
Send_String(".");
Send_Int(time[0]);
GotoLCD_Location(1,2);
Send_String("Humidity: ");
Send_Double((weather.hum)-17000,2,0); //don't ask me why the value is 17000 + humidity in percent, but works
Send_String(" % ");
if(my_state != DISP_HUM) //if any interrupt has changed the destination state, shut up.
return my_state;
if (bu==1)
{
clear_display();
bu=0;
return DISP_TEMP;
}
if (bd==1)
{
clear_display();
bd=0;
return DISP_PRESS;
}
if (bs==1)
{
clear_display();
issetup=1;
bs=0;
return SET_HOUR;
}
if (bf==1)
{
clear_display();
bf=0;
isforecast =1;
timer5s = 0;
return DISP_FC;
}
return DISP_HUM;
}
/*
* - file_server() - etc
*/
void file_server(int connfd, int lru_size) {
/* static vars for managing LRU cache */
/* read the header size from the client */
uint32_t headersize;
headersize = Receive_Int(connfd);
/* read the header from the client */
char header[headersize];
if(Receive(connfd, header, headersize) != 0) {
die("SERVER FILE_SERVER", "Connection closed while reading header");
}
/* parse the header */
char * request_type = strtok(header, "\n");
int is_put = (strcmp(request_type, "PUT") == 0);
int is_get = (strcmp(request_type, "GET") == 0);
if(!is_put && !is_get) {
send_error(connfd, "Request must begin with PUT or GET\n");
return;
}
char * filename;
if((filename = strtok(NULL, "\n")) == NULL) {
send_error(connfd, "Request must include filename\n");
return;
}
/* handle PUT */
if(is_put) {
char * filesize_str;
if((filesize_str = strtok(NULL, "\n")) == NULL) {
send_error(connfd, "PUT request must include filesize\n");
return;
}
char * t;
long filesize = strtol(filesize_str, &t, 10);
if(filesize_str == t) {
send_error(connfd, "Invalid filesize in PUT request\n");
return;
}
char file[filesize];
if(Receive(connfd, file, filesize) != 0) {
die("SERVER PUT","Connection closed while reading file for PUT");
}
/* save the file buffer to the server */
FILE * fp = fopen(filename, "wb");
fwrite(file, sizeof(file), 1, fp);
fclose(fp);
/* tell the client the PUT was successful */
char response[] = "OK\n";
Send_Int(connfd, sizeof(response));
Send(connfd, response, sizeof(response));
}
/* handle GET */
else {
FILE * fp = fopen(filename, "rb");
if(fp == NULL) {
send_error(connfd, "GET file not found\n");
return;
}
fseek(fp, 0, SEEK_END);
size_t filesize = ftell(fp);
fseek(fp, 0, SEEK_SET);
unsigned char file[filesize];
size_t bytes_read = fread(file, sizeof(unsigned char), filesize, fp);
if(bytes_read != filesize) {
fclose(fp);
send_error(connfd, "GET file could not be read\n");
return;
}
fclose(fp);
/* convert filesize to string */
int j = 1, temp_size = filesize / 10;
while (temp_size)
{
j++;
temp_size /= 10;
}
char size[j];
sprintf(size, "%d", filesize);
uint32_t response_headersize = strlen("OK\n") + strlen(filename) + j + 2;
char response_header[response_headersize];
bzero(response_header, response_headersize);
strcpy(response_header, "OK\n");
strcat(response_header, filename);
strcat(response_header, "\n");
strcat(response_header, size);
strcat(response_header, "\n");
/* send the header size */
Send_Int(connfd, response_headersize);
/* send the header */
Send(connfd, response_header, response_headersize);
/* send the file */
Send(connfd, file, filesize);
}
}
/*
* send_error() - send an error back to the client
*/
void send_error(int connfd, char * msg)
{
fprintf(stderr, "Sending error message to client: %s", msg);
Send_Int(connfd, strlen(msg));
Send(connfd, msg, strlen(msg));
}
/*
* put_file() - send a file to the server accessible via the given socket fd
*/
void put_file(int fd, char *put_name)
{
/* open file and check for error */
FILE * fp = fopen(put_name, "rb");
if (fp == NULL)
die("Put_file file error", "file not found");
/* get file size */
fseek(fp, 0, SEEK_END);
int file_size = ftell(fp);
fseek(fp, 0, SEEK_SET);
char file_buf[file_size];
/* store file in buffer */
size_t bytes_read = fread(file_buf, sizeof(unsigned char), file_size, fp);
if (bytes_read != file_size)
{
fclose(fp);
die("Put_file fread error", "bytes_read != file_size");
}
/* hacky way to get number of digits in the file size */
int j = 1, temp_size = file_size / 10; //acount for file_size of 0
while (temp_size)
{
j++;
temp_size /= 10;
}
/* close file */
fclose(fp);
/* file size as string */
char str_fsize[j];
sprintf(str_fsize, "%d", file_size);
/* create put request */
uint32_t header_size = strlen("PUT") + strlen(put_name) + strlen(str_fsize) + 3;
char put_header[header_size];
bzero(put_header, header_size);
strcpy(put_header, "PUT\n");
strcat(put_header, put_name);
strcat(put_header, "\n");
strcat(put_header, str_fsize);
strcat(put_header, "\n");
/* send size of header */
Send_Int(fd, header_size);
/* send put request header */
Send(fd, put_header, header_size);
/* send put file */
Send(fd, file_buf, file_size);
/* get size of response header and create buffer */
uint32_t rec_size = Receive_Int(fd);
char response[rec_size];
bzero(response, rec_size);
/* get response */
if (Receive(fd, response, rec_size) != 0)
die("Put_file", "Connection closed while reading response");
/* check response */
if (strncmp(response, "OK\n", rec_size))
die("Put_file server response error", response);
}
