I'm trying to send an SDP from a SIP client to Janus using JSON over HTTP.
The problem is that Janus is erroring on the SDP content with the following
error:
JANUS HTTP: Get SDP for echo plugin: {#012 "janus": "error",#012 "error":
{#012 "code": 454,#012 "reason": "JSON error: on line 9: control
character 0xd near '\"v=0'"#012 }#012} Result code 200
I tried using {s.escape.common} to escape any quotations, commas etc but it
doesn't appear to replace the control characters with newlines.
Any suggestions on how best to remove these control characters so that Janus
will accept the SDP over JSON?
Here is the relevant section of kamailio.cfg:
# HTTP: Request SDP for echo test plugin sdp_get("$avp(sdp)");
$var(res) = http_connect("janus",
"/janus/$var(JANUS-ID)/$var(ECHO-ID)", "application/json", "{ \"janus\"
: \"message\", \"transaction\" : \"testtesttest99\", \"body\" : {
\"audio\" : true }, \"jsep\" : {
\"type\" : \"offer\", \"sdp\" : \"$(avp(sdp){s.escape.common})\"
}}", "$avp(janus-pluginsession)"); xlog("L_INFO", "JANUS
HTTP: Get SDP for echo plugin: $avp(janus-pluginsession) Result code
$var(res)\n");
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