Lianja

Enumerate REST Response Header Names

Demonstrates Rest.ResponseHdrName, which returns the field name of the response header at a zero-based index. The example enumerates all headers, pairing each name with its value.

Background. Response headers can be enumerated by index from 0 through NumResponseHeaders minus one. ResponseHdrName and ResponseHdrValue use the same index for a given header.

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llSuccess = .F.

loRest = createobject("CkRest")
llBTls = .T.
llBAutoReconnect = .T.
llSuccess = loRest.Connect("example.com",443,llBTls,llBAutoReconnect)
if (llSuccess = .F.) then
    ? loRest.LastErrorText
    release loRest
    return
endif

llSuccess = loRest.SendReqNoBody("GET","/api/items/123")
if (llSuccess = .F.) then
    ? loRest.LastErrorText
    release loRest
    return
endif

lnStatusCode = loRest.ReadResponseHeader()
if (lnStatusCode < 0) then
    ? loRest.LastErrorText
    release loRest
    return
endif

//  Enumerate the response header fields by zero-based index.  ResponseHdrName returns the field name
//  and ResponseHdrValue returns the value at the same index.
lnNumHeaders = loRest.NumResponseHeaders

for i = 0 to lnNumHeaders - 1
    lcName = loRest.ResponseHdrName(i)
    if (loRest.LastMethodSuccess = .F.) then
        ? loRest.LastErrorText
        release loRest
        return
    endif

    lcValue = loRest.ResponseHdrValue(i)
    if (loRest.LastMethodSuccess = .F.) then
        ? loRest.LastErrorText
        release loRest
        return
    endif

    ? lcName + ": " + lcValue
next


release loRest