Lookahead RegExp

Question

I have the following string in JavaScript which is a basic oData batch request:

--batchfull
Content-Type:  multipart/mixed; boundary=batchitems

--batchitems
Content-Type: application/http
Content-Transfer-Encoding: binary

MERGE /WcfDataService1.svc/Orders(1) HTTP/1.1
Content-Type: application/json;type=entry

{"OID":"2340324","PID":"234234"}

--batchitems
Content-Type: application/http
Content-Transfer-Encoding: binary

POST /WcfDataService1.svc/Users HTTP/1.1
Content-Type: application/json;type=entry

{"PID":"234234","Name":"User1"}

--batchitems--
--batchfull--

Each item which makes up the batch is as follows:

--batchitems
Content-Type: application/http
Content-Transfer-Encoding: binary

POST /WcfDataService1.svc/Users HTTP/1.1
Content-Type: application/json;type=entry

{"PID":"234234","Name":"User1"}
// new line here too

I am trying to write a regex to extract each of these batch items, but I can't get it working. So far I have:

/--batchitems$.*?(?=--batchitems)/ig

But, it does not work.

1) I tried building it up so at first I had /--batchitems$/ig. Without the dollar, it worked, with it, it did not work (nothing was matched).

Any ideas how to get this working?

Answer 1

You may use [\\s\\S]*? intstead of .* , since js won't support DOTALL modifier s .

/--batchitems\n([\s\S]*?)(?=--batchitems)/ig

DEMO