Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

Update the echo-request and upload-reflector examples for the new
uwr_http_add_header_content_type() and uwr_http_add_header_content_len()
functions.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

When the uwr_get_http_content_str() function, which returns the request
body content as a string, was added it used uwr_get_http_content_len()
to determine the length of the returned string (the request body content
is not null-terminated).

This could potentially in some circumstances return too much data if the
request was split over multiple calls into the Wasm module and
uwr_get_http_content_str() was called before all the data had actually
been received.

Instead use the newly introduced uwr_get_http_total_content_sent()
function to determine the amount of data to return in the string as it
currently stands.

Fixes: bf968c9 ("Rust/rusty: Add uwr_get_http_content_str()")
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

This returns the total amount of content that the Wasm module has
received so far.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

This may not matter in rust (if you use a function before the compiler
has seen a definition for it), but anyway in preparation for adding a
uwr_get_http_total_content_sent() function, put the content length
related functions before the functions that return the content.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

This function returns the total amount of content that the Wasm module
has received so far.

This will be used in the rusty API's uwr_get_http_content_str() function
which returns the body content as a string. Due to the body content not
being null-terminated we need to know how much data to use for the
string, for which we are currently using uwr_get_http_content_len(),
which could in some cases return too much if a request is being split
over multiple calls the module.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>