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Panchali Gupta
Oct 3, 2013, 6:59:12 AM10/3/13
to mongoos...@googlegroups.com
Hi, I am new to Mongoose and I am facing a problem to display images in web pages. If i use the following I get the html form elements correctly, but the image is not displayed. Everytime it shows failed to load the URL.
static const char *html_form =
"<html><body>"
"<img src='test.PNG'/>"
"<form method='POST' action='/handle_post_request'>"
"Switch-1: <input type='text' name='input_1' /> "
"Switch-2: <input type='text' name='input_2' /> "
"<input type='submit'/>"
"</form></body></html>";
I also tried by calling a web page that contains an image (us.html) but this approach also failed. It is showing a blank page every time
static const char *html = "/us.html";
static int begin_request_handler(struct mg_connection *conn) {
mg_printf(conn, "HTTP/1.0 200 OK\r\n"
"Content-Length: %d\r\n"
"Content-Type: text/html\r\n\r\n"
"Location: %s\r\n\r\n",(int) strlen(html), html);
}
int main(void) {
.....
const char *options[] = {"listening_ports", "443"};
struct mg_callbacks callbacks;
.....
memset(&callbacks, 0, sizeof(callbacks));
callbacks.begin_request = begin_request_handler;
ctx = mg_start(&callbacks, NULL, options);
.....
}
I even failed to display the above html file as the index page.
Kindly help me out.
Regards
static const char *html_form =
"<html><body>"
"<img src='test.PNG'/>"
"<form method='POST' action='/handle_post_request'>"
"Switch-1: <input type='text' name='input_1' /> "
"Switch-2: <input type='text' name='input_2' /> "
"<input type='submit'/>"
"</form></body></html>";
I also tried by calling a web page that contains an image (us.html) but this approach also failed. It is showing a blank page every time
static const char *html = "/us.html";
static int begin_request_handler(struct mg_connection *conn) {
mg_printf(conn, "HTTP/1.0 200 OK\r\n"
"Content-Length: %d\r\n"
"Content-Type: text/html\r\n\r\n"
"Location: %s\r\n\r\n",(int) strlen(html), html);
}
int main(void) {
.....
const char *options[] = {"listening_ports", "443"};
struct mg_callbacks callbacks;
.....
memset(&callbacks, 0, sizeof(callbacks));
callbacks.begin_request = begin_request_handler;
ctx = mg_start(&callbacks, NULL, options);
.....
}
I even failed to display the above html file as the index page.
Kindly help me out.
Regards
Sergey Lyubka
Oct 3, 2013, 12:54:54 PM10/3/13
to mongoose-users
There are 2 ways to serve image data:
1. You can let mongoose send image data. In this case, set "document_root" option and place image file into the document root. Return 0 from begin_request() when image URI is requested/
2. Call mg_send_file() function to send image data from begin_request() and return 1.
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Panchali Gupta
Oct 5, 2013, 3:44:09 AM10/5/13
to mongoos...@googlegroups.com
Thanks a ton!!!! The following code finally worked:
static const char *html_form =
"<html><body>"
"<img src='test.PNG'/>"
"<form method='POST' action='/handle_post_request'>"
"Switch-1: <input type='text' name='input_1' /> <br/>"
"Switch-2: <input type='text' name='input_2' /> <br/>"
"<input type='submit' value='OK'/>"
"</form></body></html>";
"Switch-2: <input type='text' name='input_2' /> <br/>"
"<input type='submit' value='OK'/>"
"</form></body></html>";
static int begin_request_handler(struct mg_connection *conn) {
const struct mg_request_info *ri = mg_get_request_info(conn);
if (!strcmp(ri->uri, "/handle_post_request")) {
//..................
}
else if (!strcmp(ri->uri, "/test.PNG")) {
mg_send_file(conn,"test.PNG");
}
else
{
mg_printf(conn, "HTTP/1.0 200 OK/r/n"
"Content-Length: %d/r/n"
if (!strcmp(ri->uri, "/handle_post_request")) {
//..................
}
else if (!strcmp(ri->uri, "/test.PNG")) {
mg_send_file(conn,"test.PNG");
}
else
{
mg_printf(conn, "HTTP/1.0 200 OK/r/n"
"Content-Length: %d/r/n"
"Content-Type: text/html\r\n\r\n"
"%s",
(int) strlen(html_form), html_form);
}
return 1;
}
int main(void) {
(int) strlen(html_form), html_form);
}
return 1;
}
int main(void) {
Sam Kunun
Feb 17, 2014, 9:46:13 PM2/17/14
to mongoos...@googlegroups.com
Hello,
Sorry to dig old thread.
I'm having the same problem on Mongoose 5.2, where I'm not able to display images in html pages.
I'm embedding it in C code, and it seems, mg_send_file is no longer available.
What is the alternative of mg_send_file to display images ?
Thank you.
Sergey Lyubka
Feb 18, 2014, 2:56:50 AM2/18/14
to mongoose-users
Hi Sam,
are you embedding image data directly into the executable?
Sergey
Sam Kunun
Feb 18, 2014, 3:12:27 AM2/18/14
to mongoos...@googlegroups.com
Hi,
Thank you for your prompt reply.
No, the image data is not embedded to executable.
After testing, i found out that now i'm able to display image using the first option.
"You can let mongoose send image data. In this case, set "document_root" option and place image file into the document root. Return 0 from begin_request() when image URI is requested/"
Is there any other alternative ?
Thank you.
~~sam
Sergey Lyubka
Feb 18, 2014, 4:36:46 AM2/18/14
to mongoose-users
On Tue, Feb 18, 2014 at 8:12 AM, Sam Kunun <sam....@gmail.com> wrote:
Hi,Thank you for your prompt reply.No, the image data is not embedded to executable.After testing, i found out that now i'm able to display image using the first option."You can let mongoose send image data. In this case, set "document_root" option and place image file into the document root. Return 0 from begin_request() when image URI is requested/"Is there any other alternative ?
Well, there are only two options: either mongoose sends the file, or user code does.
So the alternative is to send a file yourself: read in a loop and mg_write_data() several times,
or mmap() and send it by one mg_write_data() call.
Sergey.
Maurizio Gambaruto
Oct 21, 2015, 3:27:03 AM10/21/15
to mongoose-users
Hello,
Sorry to dig old thread.
Sorry to dig old thread.
I'm having the same problem on Mongoose 5.7,
I m not find call "mg write_data", which called I can use now?
I m not find call "mg write_data", which called I can use now?
thank you all
Sergey Lyubka
Oct 21, 2015, 3:53:57 AM10/21/15
to mongoose-users
Hi Maurizio,
could you publish your code please?
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Maurizio Gambaruto
Oct 21, 2015, 4:17:00 AM10/21/15
to mongoose-users
Yes:
//--------------------------------------------------------
static void ev_handler_new(struct mg_connection *nc, int ev, void *p)
{
struct http_message *hm = (struct http_message *) p;
char content[20000] = "";
char *pszContenetx=NULL;
char *pszContenuto=NULL;
char *pszTemp = NULL;
int content_length =0;
int iDimensione_data = 0;
//-------------------------------------------------------
char buf[500] = "";
time_t curt;
struct tm* loct;
//------------------------------------------------------
curt = time (NULL);
loct = localtime (&curt);
strftime (buf, 500, "%d_%m_%Y %H:%M:%S", loct);
//------------------------------------------------------
//------------------------------------------------------
iDimensione_data=strlen(buf);
//------------------------------------------------------
if (ev == MG_EV_HTTP_REQUEST)
{
if (mg_vcmp(&hm->uri, "/hello") == 0)
{
pszContenetx=(char *) malloc(strlen("Hello! CASE LINUX SERVER "))
pszContenuto=(char *) malloc(strlen(pszContenetx)+ iDimensione_data +strlen(" DATE: ")+ 3);
sprintf(pszContenuto,"%s%s%s",pszContenetx," DATE: ",buf);
content_length=strlen(pszContenuto);
mg_printf(nc, "HTTP/1.1 200 OK\r\n" "Content-Type: text/html \r\n" "Content-Length: %d\r\n" "\r\n" "%s",content_length, pszContenuto);
mg_serve_http(nc, hm, s_http_server_opts);
}
else
{
pszTemp=strdup(returnHtmlPageText());
pszContenuto=(char *) malloc(strlen(pszTemp)+ iDimensione_data + 3);
sprintf(pszContenuto,pszTemp,buf);
content_length=strlen(pszContenuto);
mg_printf(nc,"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nContent-Length: %d\r\n\r\n%s",content_length, pszContenuto);
mg_serve_http(nc, hm, s_http_server_opts); /* Serve static content */
}
}
}
{
struct http_message *hm = (struct http_message *) p;
char content[20000] = "";
char *pszContenetx=NULL;
char *pszContenuto=NULL;
char *pszTemp = NULL;
int content_length =0;
int iDimensione_data = 0;
//-------------------------------------------------------
char buf[500] = "";
time_t curt;
struct tm* loct;
//------------------------------------------------------
curt = time (NULL);
loct = localtime (&curt);
strftime (buf, 500, "%d_%m_%Y %H:%M:%S", loct);
//------------------------------------------------------
//------------------------------------------------------
iDimensione_data=strlen(buf);
//------------------------------------------------------
if (ev == MG_EV_HTTP_REQUEST)
{
if (mg_vcmp(&hm->uri, "/hello") == 0)
{
pszContenetx=(char *) malloc(strlen("Hello! CASE LINUX SERVER "))
pszContenuto=(char *) malloc(strlen(pszContenetx)+ iDimensione_data +strlen(" DATE: ")+ 3);
sprintf(pszContenuto,"%s%s%s",pszContenetx," DATE: ",buf);
content_length=strlen(pszContenuto);
mg_printf(nc, "HTTP/1.1 200 OK\r\n" "Content-Type: text/html \r\n" "Content-Length: %d\r\n" "\r\n" "%s",content_length, pszContenuto);
mg_serve_http(nc, hm, s_http_server_opts);
}
else
{
pszTemp=strdup(returnHtmlPageText());
pszContenuto=(char *) malloc(strlen(pszTemp)+ iDimensione_data + 3);
sprintf(pszContenuto,pszTemp,buf);
content_length=strlen(pszContenuto);
mg_printf(nc,"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nContent-Length: %d\r\n\r\n%s",content_length, pszContenuto);
mg_serve_http(nc, hm, s_http_server_opts); /* Serve static content */
}
}
}
int main(int argc, char *argv[])
{
//------------------------------------------------------
struct mg_mgr mgr;
struct mg_connection *nc;
cs_stat_t st;
//------------------------------------------------------
mg_mgr_init(&mgr, NULL);
nc = mg_bind(&mgr, s_http_port, ev_handler_new);
mg_set_protocol_http_websocket(nc);
//------------------------------------------------------
if(argc>1)
{
printf("case VERIFY \n");
s_http_server_opts.document_root = "./verifica"; // root_dir=verifica into root dir exist PIPPO.png
s_http_server_opts.enable_directory_listing = "yes";
s_http_server_opts.custom_mime_types = "text/html";
}
else
{
printf("case image \n");
s_http_server_opts.document_root = "."; // Serve current directory
s_http_server_opts.enable_directory_listing = "yes";
s_http_server_opts.custom_mime_types = "text/html";
}
if (mg_stat(s_http_server_opts.document_root, &st) != 0)
{
printf("Cannot find web_root directory, exiting\n");
exit(1);
}
printf("Starting web server on port %s version %d\n", s_http_port,6);
for (;;) {
mg_mgr_poll(&mgr, 2);
}
mg_mgr_free(&mgr);
{
printf("Cannot find web_root directory, exiting\n");
exit(1);
}
printf("Starting web server on port %s version %d\n", s_http_port,6);
for (;;) {
mg_mgr_poll(&mgr, 2);
}
mg_mgr_free(&mgr);
return 0;
}
}
char *returnHtmlPageText()
{
char *pszHtmlPage=NULL;
char *pszHeaderFile = NULL;
char *pszBody=NULL;
char *pszBody1=NULL;
char *pszBody2=NULL;
char *pszBodyDateTemp = NULL;
char *pszBodyDate = NULL;
char buf[500] = "";
time_t curt;
struct tm* loct;
int iDimensione_data = 0;
//------------------------------------------------------
curt = time (NULL);
loct = localtime (&curt);
strftime (buf, 500, "%d_%m_%Y %H:%M:%S", loct);
//------------------------------------------------------
pszHeaderFile=strdup("<!DOCTYPE html><html lang=\"en\"><head><meta charset=\"utf-8\" /><title>HELLO</title></head>");
pszBody=strdup("<body> "
" <div class=\"content\">"
" <img src='PIPPO.png' style=\"float:right; height: 50px; border-radius: 3px;\">"
" <h1>GOOD MORNING! This root directroy </h1>"
" <table border=\"5\">"
" <tr>"
" <td>"
" <table border=\"2\">"
" <tr><td><img src='PIPPO.png' style=\"float:right; height: 50px; border-radius: 3px;\"></td></tr>"
" <tr><td><img src='PIPPO.png' style=\"float:right; height: 50px; border-radius: 3px;\"></td></tr>"
" <tr><td><img src=\"PIPPO.png\" style=\"float:right; height: 50px; border-radius: 3px;\"></td></tr>"
" </table></td></tr><tr><td>DATE:%s</td></tr></table></div></body></html>");
//-------------------------------------------------------------------------------
pszHtmlPage=(char *) malloc(strlen(pszHeaderFile)+strlen(pszBody)+1);
sprintf(pszHtmlPage,"%s%s",pszHeaderFile,pszBody);
//-------------------------------------------------------------------------------
return pszHtmlPage;
}
//--------------------------------------------------------
Sergey Lyubka
Oct 31, 2015, 3:32:11 AM10/31/15
to mongoose-users
Hi Maurizio,
Don't mix mg_serve_http() with your own output.
Either send the data yourself (mg_send(), mg_printf(), etc) or call mg_serve_http().
Maurizio Gambaruto
Nov 3, 2015, 6:18:10 AM11/3/15
to mongoose-users
Thanks I was wrong .
I have two questions, if possible.
0)With the code downloaded the free version , can I manage permissions with .htaccess file and sessions ? if you can have an example ?
0)With the code downloaded the free version , can I manage permissions two doors, one door and another door http https ? If you can have an example?
Thanks a lot.
And sorry for the inconvenience
And sorry for the inconvenience
Sergey Lyubka
Nov 5, 2015, 4:30:03 AM11/5/15
to mongoose-users
Hi Maurizio,
Mongoose does not support .htaccess, that is an Apache server feature.
Maurizio Gambaruto
Jan 19, 2016, 3:27:18 AM1/19/16
to mongoose-users
Hello,
Thank you,
And sorry again disorder.
I have one more question.
After mg printf and MG_F_SEND_AND_CLOSE, memory and automatically freed?
Or you need to free it.
Perhè known that after a while the memory grows.
thank you
Hello
Thank you,
And sorry again disorder.
I have one more question.
After mg printf and MG_F_SEND_AND_CLOSE, memory and automatically freed?
Or you need to free it.
Perhè known that after a while the memory grows.
thank you
Hello
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