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webclient: Add https proxy (https over http) support

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Use a separate webclient_context for tunnel establishment.

I chose this way (instead of having tunnelling steps in
the state machine of a single webclient_context) because
I want to allow tunnelling of non-HTTP protocols sooner or later.
This commit is contained in:
YAMAMOTO Takashi
2022-06-01 11:45:16 +09:00
committed by Xiang Xiao
parent a95dd30f0e
commit c116f8b673
2 changed files with 130 additions and 5 deletions
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20
include/netutils/webclient.h
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@@ -234,6 +234,7 @@ typedef CODE int (*webclient_body_callback_t)(
struct webclient_tls_connection;
struct webclient_poll_info;
struct webclient_conn_s;
struct webclient_tls_ops
{
@@ -252,6 +253,25 @@ struct webclient_tls_ops
CODE int (*get_poll_info)(FAR void *ctx,
FAR struct webclient_tls_connection *conn,
FAR struct webclient_poll_info *info);
/* init_connection: Initialize TLS over an existing connection
*
* This method is used for https proxy, which is essentially
* tunnelling over http.
*
* hostname parameter is supposed to be used for server certificate
* validation.
*
* This method can be NULL.
* In that case, webclient_perform fails with -ENOTSUP
* when it turns out that tunnelling is necessary.
*/
CODE int (*init_connection)(FAR void *ctx,
FAR struct webclient_conn_s *conn,
FAR const char *hostname,
unsigned int timeout_second,
FAR struct webclient_tls_connection **connp);
};
/* Note on webclient_client lifetime