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-rw-r--r--toys/pending/wget.c117
1 files changed, 49 insertions, 68 deletions
diff --git a/toys/pending/wget.c b/toys/pending/wget.c
index 0cf74ce4..4283fe40 100644
--- a/toys/pending/wget.c
+++ b/toys/pending/wget.c
@@ -25,61 +25,53 @@ GLOBALS(
char *filename;
)
-#define HN_LEN 128 // HOSTNAME MAX LENGTH
-#define PATH_LEN 256 // PATH MAX LENGTH
-
-struct httpinfo {
- char hostname[HN_LEN];
- char port[6]; // MAX port value: 65535
- char path[PATH_LEN];
-};
-
// extract hostname from url
-static unsigned int get_hn(char *url, char *hn) {
- unsigned int i;
+static unsigned get_hn(const char *url, char *hostname) {
+ unsigned i;
for (i = 0; url[i] != '\0' && url[i] != ':' && url[i] != '/'; i++) {
- if(i >= HN_LEN)
- error_exit("The hostname's length is lower than %d.", HN_LEN);
- hn[i] = url[i];
+ if(i >= 1024) error_exit("too long hostname in URL");
+ hostname[i] = url[i];
}
- hn[i] = '\0';
+ hostname[i] = '\0';
return i;
}
// extract port number
-static void get_port(char *url, char *port, unsigned int *url_i) {
- unsigned int i;
+static unsigned get_port(const char *url, char *port, unsigned url_i) {
+ unsigned i;
- for (i = 0; url[i] != '\0' && url[i] != '/'; i++, (*url_i)++) {
+ for (i = 0; url[i] != '\0' && url[i] != '/'; i++, url_i++) {
if('0' <= url[i] && url[i] <= '9') port[i] = url[i];
- else error_exit("Port is invalid");
+ else error_exit("wrong decimal port number");
}
if(i <= 6) port[i] = '\0';
- else error_exit("Port number is too long");
+ else error_exit("too long port number");
+
+ return url_i;
}
// get http infos in URL
-static void get_info(struct httpinfo *hi, char *url) {
- unsigned int i = 7, len;
+static void get_info(const char *url, char* hostname, char *port, char *path) {
+ unsigned i = 7, len;
- if (strncmp(url, "http://", i)) error_exit("Only HTTP can be supported.");
- len = get_hn(url+i, hi->hostname);
+ if (strncmp(url, "http://", i)) error_exit("only HTTP support");
+ len = get_hn(url+i, hostname);
i += len;
// get port if exists
if (url[i] == ':') {
i++;
- get_port(url+i, hi->port, &i);
- } else strcpy(hi->port, "80");
+ i = get_port(url+i, port, i);
+ } else strcpy(port, "80");
// get uri in URL
- if (url[i] == '\0') strcpy(hi->path, "/");
+ if (url[i] == '\0') strcpy(path, "/");
else if (url[i] == '/') {
- if (strlen(url+i) < PATH_LEN) strcpy(hi->path, url+i);
- else error_exit("The URL path's length is less than %d.", PATH_LEN);
- } else error_exit("The URL is NOT valid.");
+ if (strlen(url+i) < 1024) strcpy(path, url+i);
+ else error_exit("too long path in URL");
+ } else error_exit("wrong URL");
}
// connect to any IPv4 or IPv6 server
@@ -100,16 +92,16 @@ static int conn_svr(const char *hostname, const char *port) {
for (rp = result; rp; rp = rp->ai_next) {
if ((sock = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol))
== -1) {
- perror_msg("Socket Error");
+ perror_msg("socket error");
continue;
}
if (connect(sock, rp->ai_addr, rp->ai_addrlen) != -1)
break; // succeed in connecting to any server IP
- else perror_msg("Connect Error");
+ else perror_msg("connect error");
close(sock);
}
freeaddrinfo(result);
- if(!rp) error_exit("Can not connect to HTTP server");
+ if(!rp) error_exit("can't connect");
return sock;
}
@@ -122,46 +114,37 @@ static void mk_fld(char *name, char *value) {
strcat(toybuf, "\r\n");
}
-// make http request
-static void mk_rq(char *path) {
- strcpy(toybuf, "GET ");
- strcat(toybuf, path);
- strcat(toybuf, " HTTP/1.1\r\n");
-}
-
// get http response body starting address and its length
-static char *get_body(size_t len, size_t *body_len) {
- unsigned int i;
+static char *get_body(ssize_t len, ssize_t *body_len) {
+ int i;
for (i = 0; i < len-4; i++)
if (!strncmp(toybuf+i, "\r\n\r\n", 4)) break;
- *body_len = len-i-4;
+ *body_len = len - i - 4;
return toybuf+i+4;
}
void wget_main(void)
{
int sock;
- struct httpinfo hi;
FILE *fp;
- size_t len, body_len;
- char *body, *result, *rc, *r_str, ua[18] = "toybox wget/", ver[6];
+ ssize_t len, body_len;
+ char *body, *result, *rc, *r_str;
+ char ua[18] = "toybox wget/", ver[6], hostname[1024], port[6], path[1024];
// TODO extract filename to be saved from URL
- if (!(toys.optflags & FLAG_f))
- help_exit("The filename to be saved should be needed.");
- if (fopen(TT.filename, "r"))
- error_exit("The file(%s) you specified already exists.", TT.filename);
+ if (!(toys.optflags & FLAG_f)) help_exit("no filename");
+ if (fopen(TT.filename, "r")) perror_exit("file already exists");
- if(!toys.optargs[0]) help_exit("The URL should be specified.");
- get_info(&hi, toys.optargs[0]);
+ if(!toys.optargs[0]) help_exit("no URL");
+ get_info(toys.optargs[0], hostname, port, path);
- sock = conn_svr(hi.hostname, hi.port);
+ sock = conn_svr(hostname, port);
// compose HTTP request
- mk_rq(hi.path);
- mk_fld("Host", hi.hostname);
+ sprintf(toybuf, "GET %s HTTP/1.1\r\n", path);
+ mk_fld("Host", hostname);
strncpy(ver, TOYBOX_VERSION, 5);
strcat(ua, ver);
mk_fld("User-Agent", ua);
@@ -170,13 +153,11 @@ void wget_main(void)
// send the HTTP request
len = strlen(toybuf);
- if (write(sock, toybuf, len) != len) perror_exit("HTTP GET failed.");
+ if (write(sock, toybuf, len) != len) perror_exit("write error");
// read HTTP response
- if ((len = read(sock, toybuf, 4096)) == -1)
- perror_exit("HTTP response failed.");
- if (!strstr(toybuf, "\r\n\r\n"))
- error_exit("HTTP response header is too long.");
+ if ((len = read(sock, toybuf, 4096)) == -1) perror_exit("read error");
+ if (!strstr(toybuf, "\r\n\r\n")) error_exit("too long HTTP response");
body = get_body(len, &body_len);
result = strtok(toybuf, "\r");
strtok(result, " ");
@@ -185,13 +166,13 @@ void wget_main(void)
// HTTP res code check
// TODO handle HTTP 302 Found(Redirection)
- if (strcmp(rc, "200")) error_exit("HTTP response: %s(%s).", rc, r_str);
+ if (strcmp(rc, "200")) error_exit("res: %s(%s)", rc, r_str);
- if (!(fp = fopen(TT.filename, "w"))) perror_exit("File write error");
- if (fwrite(body, sizeof(char), body_len, fp) != body_len)
- error_exit("File write is not successful.");
+ if (!(fp = fopen(TT.filename, "w"))) perror_exit("fopen error");
+ if (fwrite(body, 1, body_len, fp) != body_len)
+ error_exit("fwrite error");
while ((len = read(sock, toybuf, 4096)) > 0)
- if (fwrite(toybuf, sizeof(char), len, fp) != len)
- error_exit("File write is not successful.");
- if (fclose(fp) == EOF) perror_exit("File Close Error");
-} \ No newline at end of file
+ if (fwrite(toybuf, 1, len, fp) != len)
+ error_exit("fwrite error");
+ if (fclose(fp) == EOF) perror_exit("fclose error");
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 19:13:48 +0000