int GetFile(struct COMMAND* cmd,struct FTS* fts)
{
const int BUF_SIZE=1024;
FILE* df=NULL;
char* dfile;
dfile=cmd->args[0];
if(fts->mode==FTS_MODE_ASCII)
df=fopen(cmd->args[0],"r");
else if(fts->mode == FTS_MODE_BINARY)
df=fopen(cmd->args[0],"rb");
if(df==NULL)
{
char buf[BUF_SIZE];
sendResponseCode(fts->sockfd,CHANDLER_OPERATION_FAILED);
snprintf(buf,BUF_SIZE,"%s : Coulnd't open file for writing\n",dfile);
write(fts->sockfd,buf,strlen(buf));
writeEOFToSocket(fts->sockfd);
return (CHANDLER_OPERATION_FAILED);
}
sendResponseCode(fts->sockfd,0); // Sending success response code
if(fts->mode==FTS_MODE_ASCII)
{
sendFileInAsciiMode(fts->sockfd,df);
}
else if(fts->mode==FTS_MODE_BINARY)
{
sendFileInBinaryMode(fts->sockfd,df);
}
return (CHANDLER_SUCCESSFUL);
}
int PutFile(struct COMMAND* cmd,struct FTS* fts)
{
const int BUF_SIZE=1024;
FILE* df=NULL;
char* dfile;
int ret;
switch(cmd->numArgs)
{
case 1:
dfile=cmd->args[0];
if(fts->mode==FTS_MODE_ASCII)
df=fopen(cmd->args[0],"w");
else if(fts->mode == FTS_MODE_BINARY)
df=fopen(cmd->args[0],"wb");
break;
case 2:
dfile=cmd->args[1];
if(fts->mode==FTS_MODE_ASCII)
df=fopen(cmd->args[1],"w");
else if(fts->mode == FTS_MODE_BINARY)
df=fopen(cmd->args[1],"wb");
break;
}
if(df==NULL)
{
const int BUF_SIZE=1024;
char buf[BUF_SIZE];
sendResponseCode (fts->sockfd,-1);
snprintf(buf,BUF_SIZE,"%s : Coulnd't open file for writing\n",dfile);
write(fts->sockfd,buf,strlen(buf));
writeEOFToSocket (fts->sockfd);
sendResponseCode (fts->sockfd,CHANDLER_OPERATION_FAILED);
return (CHANDLER_OPERATION_FAILED);
}
sendResponseCode (fts->sockfd,0);
ret=receiveResponseCode(fts->sockfd);
if(ret==0) // File ready to be sent
{
if(fts->mode==FTS_MODE_ASCII)
{
writeAsciiResponseToFile(fts->sockfd,df);
}
else if(fts->mode==FTS_MODE_BINARY)
{
writeBinaryResponseToFile(fts->sockfd,df);
}
fclose(df);
}
else // Some error has occurred
{
printResponseText(fts->sockfd);
fclose(df);
return (ret);
}
return (CHANDLER_SUCCESSFUL);
}
int serverChangeDirectory(struct COMMAND* cmd,struct FTS* fts)
{
if(chdir(cmd->args[0]) < 0)
{
sendResponseCode(fts->sockfd,CHANDLER_OPERATION_FAILED);
return (CHANDLER_OPERATION_FAILED);
}
else
{
sendResponseCode(fts->sockfd,CHANDLER_SUCCESSFUL);
return (CHANDLER_SUCCESSFUL);
}
}
int serverMakeDirectory(struct COMMAND* cmd,struct FTS* fts)
{
const int BUF_SIZE=1024;
char buf[BUF_SIZE];
const int PERMS=0744;
if(mkdir(cmd->args[0],PERMS) < 0)
{
snprintf(buf,BUF_SIZE,"Make directory : %s\n",strerror(errno));
write(fts->sockfd,buf,strlen(buf));
writeEOFToSocket(fts->sockfd);
sendResponseCode(fts->sockfd,CHANDLER_OPERATION_FAILED);
return (CHANDLER_OPERATION_FAILED);
}
writeEOFToSocket(fts->sockfd);
sendResponseCode(fts->sockfd,CHANDLER_SUCCESSFUL);
return (CHANDLER_SUCCESSFUL);
}
int ChangeMode(struct COMMAND* cmd,struct FTS* fts)
{
if(!strcmp(cmd->cmd,"ascii"))
{
fts->mode=FTS_MODE_ASCII;
sendResponseCode(fts->sockfd,CHANDLER_SUCCESSFUL);
return (CHANDLER_SUCCESSFUL);
}
else if(!strcmp(cmd->cmd,"bin"))
{
fts->mode=FTS_MODE_BINARY;
sendResponseCode(fts->sockfd,CHANDLER_SUCCESSFUL);
return (CHANDLER_SUCCESSFUL);
}
sendResponseCode(fts->sockfd,CHANDLER_UNEXPECTED_ERROR);
return (CHANDLER_UNEXPECTED_ERROR);
}
int MPutFile(struct COMMAND* cmd,struct FTS* fts)
{
const int BUF_SIZE=1024;
FILE* df=NULL;
int ret,i;
for(i=0;i<cmd->numArgs;i++)
{
sendResponseCode (fts->sockfd,i);
ret=receiveResponseCode (fts->sockfd);
if(ret==-1)
continue;
if(fts->mode==FTS_MODE_ASCII)
df=fopen(cmd->args[i],"w");
else if(fts->mode == FTS_MODE_BINARY)
df=fopen(cmd->args[i],"wb");
ret=errno;
if(df==NULL)
{
char buf[BUF_SIZE];
sendResponseCode (fts->sockfd,-1);
snprintf(buf,BUF_SIZE,"%s : %s\n",cmd->args[i],strerror(ret));
continue;
}
sendResponseCode(fts->sockfd,0);
ret=receiveResponseCode(fts->sockfd);
if(ret==0) // File ready to be sent
{
if(fts->mode==FTS_MODE_ASCII)
{
writeAsciiResponseToFile(fts->sockfd,df);
}
else if(fts->mode==FTS_MODE_BINARY)
{
writeBinaryResponseToFile(fts->sockfd,df);
}
fclose(df);
}
else // Some error has occurred
{
fclose(df);
}
}
sendResponseCode(fts->sockfd,-1);
return (CHANDLER_SUCCESSFUL);
}
int MGetFile(struct COMMAND* cmd,struct FTS* fts)
{
const int BUF_SIZE=1024;
FILE* df=NULL;
int code;
puts("before expanding");
expandCommand(cmd);
puts ("after expanding");
sendCommand (cmd,fts->sockfd);
while(1)
{
code=receiveResponseCode(fts->sockfd);
if(code == -1)
break;
if(fts->mode==FTS_MODE_ASCII)
df=fopen(cmd->args[code],"r");
else if(fts->mode == FTS_MODE_BINARY)
df=fopen(cmd->args[code],"rb");
if(df==NULL)
{
char buf[BUF_SIZE];
snprintf(buf,BUF_SIZE,"%s : Coulnd't open file for writing\n",cmd->args[code]);
sendResponseCode(fts->sockfd,-1);
write(fts->sockfd,buf,strlen(buf));
writeEOFToSocket(fts->sockfd);
continue;
}
sendResponseCode(fts->sockfd,0);
if(fts->mode==FTS_MODE_ASCII)
{
sendFileInAsciiMode(fts->sockfd,df);
}
else if(fts->mode==FTS_MODE_BINARY)
{
sendFileInBinaryMode(fts->sockfd,df);
}
fclose(df);
}
return (CHANDLER_SUCCESSFUL);
}
/** @brief reads a char from Serial and acts depending on the current state
* @param c char from the request
* @see interpretateRequest
*/
void Comm::readChar( char c ) {
if(comm_state==COMM_LISTENING) {
if(c==' ' || c=='\n' || c=='\r' ) {
//word completed: interpretate
interpretateRequest(recv_str);
recv_str[0]='\0';
} else {
//add c to word
if(strlen(recv_str)<COMM_MAX_STRING_LENGTH-1) {
byte len = strlen(recv_str);
recv_str[ len ] = c;
recv_str[ len+1 ] = '\0';
}
}
}else if(comm_state==COMM_RECEIVING_FILE) {
if(file->isOpen()) {
if(c==EOT) {
file->sync();
file->close();
delete file;
sendResponseCode(MSG_200);
endTransmission();
comm_state=COMM_LISTENING;
onFileReceived();
} else {
file->write(c);
}
} else {
delete file;
sendResponseCode(MSG_500);
endTransmission();
comm_state=COMM_LISTENING;
}
}
}
/** @brief interpretates request
* @details Interpretating requests are very simple, the structure is always: ACTION SUBJECT
* (with a whitespace separating both).
* @param req string containing the next word of the request
*/
void Comm::interpretateRequest(char *req) {
byte response;
if(req_state == REQ_ROOT) {
//Determinate ACTION
if( strcmpP( req, req_GET) ) {
req_state = REQ_GET;
} else if(strcmpP( req, req_POST )) {
req_state = REQ_POST;
} else if(strcmpP( req, req_DELETE )) {
req_state = REQ_DELETE;
}
}else {
//Determinate SUBJECT and launch callbacks
if(req_state == REQ_GET) {
if(this->GET==NULL) {
sendResponseCode(MSG_500);
endTransmission();
} else {
response = this->GET(req);
sendResponseCode(response);
if(response!=MSG_200) endTransmission();
}
}else
if(req_state == REQ_POST) {
if(this->POST==NULL) {
sendResponseCode(MSG_500);
endTransmission();
} else {
response = this->POST(req);
if(response!=MSG_200) {
sendResponseCode(response);
endTransmission();
}
//response will be sent AFTER receiving the data
}
}else
if(req_state == REQ_DELETE) {
if(this->DELETE==NULL) {
sendResponseCode(MSG_500);
endTransmission();
} else {
sendResponseCode(this->DELETE(req));
endTransmission();
}
}
req_state = REQ_ROOT;
}
}