Form parameter encoding for Service Callout

[scastrianni]

I have a policy:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ServiceCallout async="false" continueOnError="false" enabled="true" name="LoginPAT">

<DisplayName>LoginPAT</DisplayName>
<Request clearPayload="true" variable="loginPATRequest">

<Set>

<Headers>

<Header name="apikey">{private.patClientSecret}</Header>

</Headers>
<Verb>POST</Verb>
<FormParams>

<FormParam name="username">{patId}</FormParam>
<FormParam name="password">{patPassword}</FormParam>
<FormParam name="client_id">{private.patClientId}</FormParam>
<FormParam name="client_secret">{private.patClientSecret}</FormParam>
<FormParam name="grant_type">password</FormParam>

</FormParams>

</Set>

</Request>
<Response>loginPATResponse</Response>
<HTTPTargetConnection>

<LoadBalancer>

<Server name="SAM-API"/>

</LoadBalancer>
<Path>/authentication/v1/Authenticate/PersonalAccessToken</Path>

</HTTPTargetConnection>

</ServiceCallout>

This policy fails when some of the formparam values have special characters. For example, if {patPassword} above contains:

uZ9xNh8FE{mNX+[8

then it fails. If I make the same REST call in Postman, Postman will use the --data-urlencode option in CURL to handle these special characters. How can I handle these special characters in the ServiceCallout policy?

[API-Evangelist]

Did you try adding application/x-www-form-urlencoded to the header?

==

<Set
<FormParams>

<FormParam name="username">{patId}</FormParam>
<FormParam name="password">{patPassword}</FormParam>
<FormParam name="client_id">{private.patClientId}</FormParam>
<FormParam name="client_secret">{private.patClientSecret}</FormParam>
<FormParam name="grant_type">password</FormParam>

</FormParams>

<Headers>
<Header name="Content-Type">application/x-www-form-urlencoded</Header>

<Header name="apikey">{private.patClientSecret}</Header>

</Headers>
<Verb>POST</Verb>
</Set>

==

[scastrianni]

That header is automatically added by Apigee because I am using <FormParm/>.  I found the problem:

I am using the OnPrem version of Apigee and had modified the message processor configuration over 2 years ago.  I had:

conf/http.properties+HTTPClient.urlencode.request.line=false

in the message-processor.properties file.  When I set it back to true, everything is urlencoded correctly.

Now I just have to remember why I set it to false 2 years ago.  It isn't in my GIT history.