On Sun, Apr 21, 2019 at 06:15:22PM +0000, David Dean wrote:

> 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");