> On 29 Apr 2021, at 11:27 pm, K. Alex Mills <k.alex.mi...@gmail.com> wrote: > > Partial responses inline, HTH. > > On Thu, Apr 29, 2021, 6:09 AM Amit Saha <amitsaha...@gmail.com > <mailto:amitsaha...@gmail.com>> wrote: > Hi all, when an incoming request comes in, does the ListenAndServe() > function read the first line (as explained in > https://developer.mozilla.org/en-US/docs/Web/HTTP/Messages > <https://developer.mozilla.org/en-US/docs/Web/HTTP/Messages>) to figure > out whether there is a handler registered or not for the path and then > simply hands it over to the handler (if there is one)? > > In the http package, that role is played by the ServeMux > <https://golang.org/pkg/net/http/#ServeMux>. > > > It seems like it is also reading the headers, and then populating the > http.Request object with them. But, I am curious as to why does it do > so? Is there any specific header that the server must look for? > > HTTP headers arrive on the wire before the body, so they have to be consumed > prior to the body. The HTTP package parses them and makes them available so > the handler and middleware can make use of them as needed to do > header-related things like authentication. > > > As far as the Body is concerned, that is left to the handler to > decide, is that correct? > > I guess you mean that the handler gets to decide for itself whether to read > the body or not. AFAIK, that's correct. > > One benefit of parsing the headers into a map is that it makes HTTP > middleware more composeable and easier to write. Parsing the headers first > means different middlewares can examine the same headers. The same is not > true of the body, which can only be consumed once unless you add special > handling to store it in memory for later. >
Thank you for the replies, they do help clarify my understanding. > > Thanks, > Amit. > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com > <mailto:golang-nuts%2bunsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/CANODV3kSLPyV0snkPOr8Q_j%2BR%3DGOfVie2FNxEA1B-8%2BFvQxMEA%40mail.gmail.com > > <https://groups.google.com/d/msgid/golang-nuts/CANODV3kSLPyV0snkPOr8Q_j%2BR%3DGOfVie2FNxEA1B-8%2BFvQxMEA%40mail.gmail.com>. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/BDE1F30C-901D-4CE5-AB75-82A10499CDD3%40gmail.com.
