start method test 20:30

server.c

@@ -384,7 +384,7 @@ bool show_start_page(int sockfd, char* username) {
     // the length needs to include the html tags for the username
     long added_length = username_length + 9;
 
-    char added[2048];
+    char added[added_length];
 
     // create added string
     strncpy(added, added_prefix, added_prefix_length);

test.c

+else if (strstr(buff, "user=") != NULL) {
+    // locate the username, it is safe to do so in this sample code, but usually
+    // the result is expected to be
+    // copied to another buffer using strcpy or strncpy to ensure that it will
+    // not be overwritten.
+    char *username = strstr(buff, "user=") + 5;
+    int username_length = strlen(username);
+    // the length needs to include the ", " before the username
+    long added_length = username_length + 9;
+
+    // get the size of the file
+    struct stat st;
+    stat("2_start.html", &st);
+    // increase file size to accommodate the username
+    long size = st.st_size + added_length;
+    n = sprintf(buff, HTTP_200_FORMAT, size);
+    // send the header first
+    if (write(sockfd, buff, n) < 0) {
+        perror("write");
+        return false;
+    }
+    // read the content of the HTML file
+    int filefd = open("2_start.html", O_RDONLY);
+    n = read(filefd, buff, 2048);
+    if (n < 0) {
+        perror("read");
+        close(filefd);
+        return false;
+    }
+    close(filefd);
+    // printf("let me see what in the file\n");
+    // move the trailing part backward
+    int p1, p2;
+    for (p1 = size - 1, p2 = p1 - added_length; p1 >= size - 212; --p1, --p2)
+        buff[p1] = buff[p2];
+    // copy the username
+    char *buf = "<p>";
+    int buf_length = strlen(buf);
+    strncpy(buff + p2, buf, buf_length);
+    strncpy(buff + p2 + buf_length, username, username_length);
+    char *endbuf = "</p >\n\n";
+    int endbuf_length = strlen(endbuf);
+    strncpy(buff + p2 + buf_length + username_length, endbuf, endbuf_length);
+    buff[p2 + buf_length + username_length + endbuf_length] = '<';
+
+    /*for (int i 
\ No newline at end of file

testresult

-
-xunz4@None:~/comp30023/comp30023-2019-project-1$ ./image_tagger 172.26.37.133 8000
-image_tagger server is now running at IP: 172.26.37.133 on port 8000
-new connection from 10.9.131.233 on socket 4
-New request from 4
-GET / HTTP/1.1
-Host: 172.26.37.133:8000
-Connection: keep-alive
-Purpose: prefetch
-Upgrade-Insecure-Requests: 1
-User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36
-Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
-Accept-Encoding: gzip, deflate
-Accept-Language: zh-CN,zh;q=0.9,en;q=0.8
-
-
-END
-new connection from 10.9.131.233 on socket 5
-socket 5 close the connection
-New request from 4
-POST / HTTP/1.1
-Host: 172.26.37.133:8000
-Connection: keep-alive
-Content-Length: 9
-Cache-Control: max-age=0
-Origin: http://172.26.37.133:8000
-Upgrade-Insecure-Requests: 1
-Content-Type: application/x-www-form-urlencoded
-User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36
-Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
-Referer: http://172.26.37.133:8000/
-Accept-Encoding: gzip, deflate
-Accept-Language: zh-CN,zh;q=0.9,en;q=0.8
-
-user=test
-END
-new connection from 10.9.131.233 on socket 5
-new connection from 10.9.131.233 on socket 6
-New request from 6
-GET / HTTP/1.1
-User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36 Edge/17.17134
-Accept-Language: zh-Hans-CN,zh-Hans;q=0.8,ja;q=0.6,en-AU;q=0.4,en;q=0.2
-Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
-Upgrade-Insecure-Requests: 1
-Accept-Encoding: gzip, deflate
-Host: 172.26.37.133:8000
-Connection: Keep-Alive
-
-
-END
-socket 5 close the connection
-New request from 6
-POST / HTTP/1.1
-Referer: http://172.26.37.133:8000/
-Cache-Control: max-age=0
-Content-Type: application/x-www-form-urlencoded
-User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36 Edge/17.17134
-Accept-Language: zh-Hans-CN,zh-Hans;q=0.8,ja;q=0.6,en-AU;q=0.4,en;q=0.2
-Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
-Upgrade-Insecure-Requests: 1
-Accept-Encoding: gzip, deflate
-Host: 172.26.37.133:8000
-Content-Length: 9
-Connection: Keep-Alive
-
-user=user
-END
-New request from 6
-GET /?start=Start HTTP/1.1
-Referer: http://172.26.37.133:8000/
-Cache-Control: max-age=0
-User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36 Edge/17.17134
-Accept-Language: zh-Hans-CN,zh-Hans;q=0.8,ja;q=0.6,en-AU;q=0.4,en;q=0.2
-Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
-Upgrade-Insecure-Requests: 1
-Accept-Encoding: gzip, deflate
-Host: 172.26.37.133:8000
-Connection: Keep-Alive
-
-
-END
-New request from 4
-GET /?start=Start HTTP/1.1
-Host: 172.26.37.133:8000
-Connection: keep-alive
-Upgrade-Insecure-Requests: 1
-User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36
-Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
-Referer: http://172.26.37.133:8000/
-Accept-Encoding: gzip, deflate
-Accept-Language: zh-CN,zh;q=0.9,en;q=0.8
-
-
-END
-new connection from 10.9.131.233 on socket 5