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Hi,
Is there way to save the whole filename and its extension. Right i now i have a client/server application where client sends a file(for example test.jpg) server save the data of that file with specified filename "copy-client". It dose not saves the filename and its extension.
How do i save the filename and its extension?
Code:FILE *fp = fopen("copy-client", "w" );
fwrite(buffer, sizeof(buffer), current, fp);
So change "copy-client" to "copy-client.jpg".
Quzah.
I know this works, but is not the solution. Fore example if i send next time a "test.txt" file, server must save filename and the extension of the data as it is, in this case as "test.txt" . I dont need to change by hand everytime.
So put it into a buffer and use that for the name of the file. What's the problem?
Quzah.
I tried your way by putting it in a buffer.
The results: it makes a file "upload" with the name of string commando which clients sends. As you can see in the code i use prints function to print out the buffer, this is the output of the bufferCode:// create and init a char buffer
char *buffer = malloc(BUFFSIZE);
buffer[0] = '\0';
int stop_received = 0;
int nr_bytes_recv = 0;
while (! stop_received) {
// receive data in buffer
nr_bytes_recv = recv(s, buffer, BUFFSIZE, 0);
if (nr_bytes_recv > BUFFSIZE) {
perror("Buffer too small");
exit(EXIT_FAILURE);
}
buffer[nr_bytes_recv]= '\0'; // close string
printf("Server received : %s", buffer);
if(strncmp(buffer, "upload", 6) == 0){
// echo message
rv = send(s, buffer, nr_bytes_recv,0);
if (rv < 0) {
perror("Error sending");
exit(EXIT_FAILURE);
}
do {
// receive data in buffer
nr_bytes_recv = recv(s, buffer, (BUFFSIZE-current), 0);
if(nr_bytes_recv > 0)
current += nr_bytes_recv;
} while (nr_bytes_recv > 0);
FILE *fp = fopen(buffer, "w" );
fwrite(buffer, sizeof(buffer), current, fp);
fclose(fp);
close(s);
stop_received = 1;
I think the problem is the client sends 3 items in a buffer, the string "upload", filedata and filename. The fopen function takes the first item from the buffer instead of filename.Quote:
Server received : upload
test.txt
So take the right thing out of your buffer.Quote:
Originally Posted by Alix
I don't know why you are making this so hard. You said you are getting the name from some place, right? Take that name when you get it, and stick it in a variable some place, and use that for fopen:Looks about right. So take the name that you said you had in the first post, and stick it in a buffer, and slap the extension on the end (since you said you're getting it some place too), and then open the file.Code:#include<stdio.h>
int main( void )
{
char buf[ BUFSIZ ] = { 0 };
FILE *fp = NULL;
printf( "Enter a file name: " );
fflush( stdout );
scanf( "%s", buf );
printf( "You entered: \'%s\'. Opening...\n", buf );
fp = fopen( buf, "r" );
if( fp == NULL )
printf( "Your file didn't open.\n" );
else
fclose( fp );
return 0;
}
If all that is too confusing:
1. Format your string.
2. Use it to open your file.
Quzah.
Quote:
Originally Posted by Alix
Seriously?
Seems pretty obvious...Code:char filename[256];
// put client's filename in filename[]
fp = fopen(filename,"w");
I understood that part, i know i have to do the folowing:Quote:
Originally Posted by CommonTater
Code:char filename[10];
scanf("%s", filename);
FILE *fp = fopen(filename, "w" );
But that is not my problem, my problem is how do i extract the second string from the buffer. The second string is just the name of the file (test.txt), you can see that on my previous post when i print the buffer. I have a buffer. that buffer i use for my protocol en for the data to be saved. The question is how do i specifie the filename from that buffer. How do i link those two with each other? I just dont see it.Code:char *buffer = malloc(BUFFSIZE);
:confused::confused::confused:Code:scanf("%s %s", &buffer);
If you know the format of the data you are receiving, just pick it apart as you get it. If I give you a string, and ask you to take the second word from it, how would you do it?
"take second word"
If you can't understand that, then you can't solve this problem, regardless of where your data comes from.
Quzah.
Quote:
Originally Posted by quzah
like that?Code:char *string;
string= (char *) malloc (25);
scanf("%5s ", string);
printf(string)
:confused:
But then how do i know wich string is the name of the file that is stored in the buffer?
No. Not like that. How does that get you the word 'second' out of that? If you can't walk through the processes on paper, how can you expect to do it in C? Write out how to find the second word in a sentence. If you can't, you can't possibly understand how to program this.Quote:
Originally Posted by Alix
Quzah.
In sentence:
"take second word"
:rolleyes:Quote:
1) Read the first string,
2) Stop at the empty space,
3) Read the second string
4) Stop at the empty space
5) Select the string the last string
I have almost working ;) , but only the problem is i specifie the wrong string. What it dose it takes the first string of the content of the file as the name of the file and stores it. Instead of using scanf i decided to use sscanf . like i sayt in my buffer there are 3 information are stored
First: string "upload"
Second: the name of the file
Third: the content of the data
This is my code:
i tested with simple .txt with one word inside the file "serverrrr". i just test with array of [10]. Results with this case it makes a file, only it names the file by taking the contents of the file en closing with extension .txt .Code:char string1[10];
sscanf(buffer,"%s %s %s",string1);
printf("%s ->", string1);
FILE *fp = fopen(string1, "w" );
Same question, how do i select the correct string from the buffer? how do i specify that?Quote:
serverrrr.txt
Ok never mind, i got it working. sscanf was the solution and the problem of the previus post is also solved. The solution was dat the call of sscanf was in wrong place.
Thanks