07-24-2012
Using cURL to submit a post form
I am trying to write a shell script to use curl in order to automate downloading data from a website. The URL with the post form is here: http://try-db.org/de/InfoBySpecies.php .
I have a list of about 1800 different species I want to check. For Example, choose the first species and use the Queries option "Measurement table ...". The resulting page will contain a html table with the data. Getting to this stage would be nice progress, but eventually this script needs to parse out the download link and download the resulting tab delimited file.
Command:
curl --data "species=29&OutTab=tab1&submit=Submit&dummy=" http://try-db.org/de/InfoBySpecies.php
Any suggestions would be appreciated.
Cheers.
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LEARN ABOUT MOJAVE
curlopt_postfieldsize
CURLOPT_POSTFIELDSIZE(3) curl_easy_setopt options CURLOPT_POSTFIELDSIZE(3)
NAME
CURLOPT_POSTFIELDSIZE - size of POST data pointed to
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POSTFIELDSIZE, long size);
DESCRIPTION
If you want to post data to the server without having libcurl do a strlen() to measure the data size, this option must be used. When this
option is used you can post fully binary data, which otherwise is likely to fail. If this size is set to -1, the library will use strlen()
to get the size.
If you post more than 2GB, use CURLOPT_POSTFIELDSIZE_LARGE(3).
DEFAULT
-1
PROTOCOLS
HTTP
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
const char *data = "data to send";
curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
/* size of the POST data */
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, (long) strlen(data));
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);
curl_easy_perform(curl);
}
AVAILABILITY
Along with HTTP
RETURN VALUE
Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.
SEE ALSO
CURLOPT_POSTFIELDS(3), CURLOPT_POSTFIELDSIZE_LARGE(3),
libcurl 7.54.0 February 03, 2016 CURLOPT_POSTFIELDSIZE(3)