curl_formget.3: CURLFORM_STREAM has its drawbacks

Due to a design flaw, the CURLFORM_STREAM option doesn't really work
with curl_formget until after curl_easy_perform (or similar).

diff --git a/docs/libcurl/curl_formget.3 b/docs/libcurl/curl_formget.3
index b214a50..b526221 100644 (file)
--- a/docs/libcurl/curl_formget.3
+++ b/docs/libcurl/curl_formget.3
@@ -23,24 +23,27 @@
 .SH NAME
 curl_formget - serialize a previously built multipart/formdata HTTP POST chain
 .SH SYNOPSIS
+.nf
 .B #include <curl/curl.h>
-.sp
-.BI "void curl_formget(struct curl_httppost *" form, " void *" arg,
-.BI " curl_formget_callback " append ");"
-.ad
+
+void curl_formget(struct curl_httppost * form, void *userp,
+                  curl_formget_callback append );
 .SH DESCRIPTION
 curl_formget() is used to serialize data previously built/appended with
-\fIcurl_formadd(3)\fP. Accepts a void pointer as second argument which will be
-passed to the curl_formget_callback function.
+\fIcurl_formadd(3)\fP. Accepts a void pointer as second argument named
+\fIuserp\fP which will be passed as the first argument to the
+curl_formget_callback function.
 
-.BI "typedef size_t (*curl_formget_callback)(void *" arg, " const char *" buf,
+.BI "typedef size_t (*curl_formget_callback)(void *" userp, " const char *" buf,
 .BI " size_t " len ");"
-.nf
 
 The curl_formget_callback will be executed for each part of the HTTP POST
-chain. The void *arg pointer will be the one passed as second argument to
-curl_formget(). The character buffer passed to it must not be freed. The
+chain. The character buffer passed to the callback must not be freed. The
 callback should return the buffer length passed to it on success.
+
+If the \fBCURLFORM_STREAM\fP option is used in the formpost, it will prevent
+\fIcurl_formget(3)\fP from working until you've performed the actual HTTP
+request as only then will libcurl get the actual read callback to use!
 .SH RETURN VALUE
 0 means everything was ok, non-zero means an error occurred
 .SH EXAMPLE
@@ -52,6 +55,7 @@ callback should return the buffer length passed to it on success.
    (*(size_t *) arg) += len;
    return len;
  }
+
  size_t print_httppost(struct curl_httppost *post)
  {
    size_t total_size = 0;