[#OSSL_HTTP_REQ_CTX_exchange]
= OSSL_HTTP_REQ_CTX_exchange
:mrdocs:

Exchange the prepared HTTP request and response, retrying non‐blocking I/O until done or timeout.

== Synopsis

Declared in `<openssl/http.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BIO.adoc[BIO]*
OSSL_HTTP_REQ_CTX_exchange(xref:OSSL_HTTP_REQ_CTX.adoc[OSSL_HTTP_REQ_CTX]* rctx);
----

== Return Value

BIO positioned at the response body (memory BIO for expected ASN.1, else `rbio);` do not free; NULL on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *rctx*
| Request context with BIOs and headers/body configured.
|===


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