Multiple Range requests in HTTP 1.1

17/02/2005, 06h40

Hi All,

Is it possible to get the full content of a file by using Range Header
in HTTP 1.1? Basically the idea is to use persistent connection with
the server and request for next chunk of specific byte range. Can
multiple Range requests can be sent to server, connecting only once?

one more thing I am unable to understand is what is the minimum range
i can ask for?Sometimes the folowing error is appearing in the
responce. This error string appears after getting some responce (ie.
some chunks)

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>501 Method Not Implemented</title>
</head><body>
<h1>Method Not Implemented</h1>
<p> to /index.html.en not supported.<br />
</p>
<hr>
<address>Apache/2.0.52 (Win32) Server at EC4SEMI-112316.wipro.com Port
80</address>
</body></html>

Basically the confusion is with, How the server will act on the
subsequent requests. Will it give the full responce (with date,server
name and all responce headers) for each request sent and then followed
by data? or it will simply gives responce line for first request only
and then only data(specified data in subsequent range requests) for
subsequent requests?

Any will be appriciated.
Thanks.

17/02/2005, 13h19

In article <e6443ee5.0502162240.7e190872@posting.google.com >,
suyog.upadhye@wipro.com (suyog) wrote:

> Hi All,
>
> Is it possible to get the full content of a file by using Range Header
> in HTTP 1.1? Basically the idea is to use persistent connection with
> the server and request for next chunk of specific byte range. Can
> multiple Range requests can be sent to server, connecting only once?

Yes. These are orthogonal features, and nothing precludes using them
together.

>
> one more thing I am unable to understand is what is the minimum range
> i can ask for?Sometimes the folowing error is appearing in the
> responce. This error string appears after getting some responce (ie.
> some chunks)
>
> <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
> <html><head>
> <title>501 Method Not Implemented</title>
> </head><body>
> <h1>Method Not Implemented</h1>
> <p> to /index.html.en not supported.<br />
> </p>
> <hr>
> <address>Apache/2.0.52 (Win32) Server at EC4SEMI-112316.wipro.com Port
> 80</address>
> </body></html>
>
> Basically the confusion is with, How the server will act on the
> subsequent requests. Will it give the full responce (with date,server
> name and all responce headers) for each request sent and then followed
> by data? or it will simply gives responce line for first request only
> and then only data(specified data in subsequent range requests) for
> subsequent requests?

Each request and response is independent. Every response has to be
fully formed, with a response code line, response-headers, and an
optional body. Persistent connections just save the client from having
to reconnect -- everything else is the same.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

17/02/2005, 13h19

In article <e6443ee5.0502162240.7e190872@posting.google.com >,
suyog.upadhye@wipro.com (suyog) wrote:

> Hi All,
>
> Is it possible to get the full content of a file by using Range Header
> in HTTP 1.1? Basically the idea is to use persistent connection with
> the server and request for next chunk of specific byte range. Can
> multiple Range requests can be sent to server, connecting only once?

Yes. These are orthogonal features, and nothing precludes using them
together.

>
> one more thing I am unable to understand is what is the minimum range
> i can ask for?Sometimes the folowing error is appearing in the
> responce. This error string appears after getting some responce (ie.
> some chunks)
>
> <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
> <html><head>
> <title>501 Method Not Implemented</title>
> </head><body>
> <h1>Method Not Implemented</h1>
> <p> to /index.html.en not supported.<br />
> </p>
> <hr>
> <address>Apache/2.0.52 (Win32) Server at EC4SEMI-112316.wipro.com Port
> 80</address>
> </body></html>
>
> Basically the confusion is with, How the server will act on the
> subsequent requests. Will it give the full responce (with date,server
> name and all responce headers) for each request sent and then followed
> by data? or it will simply gives responce line for first request only
> and then only data(specified data in subsequent range requests) for
> subsequent requests?

Each request and response is independent. Every response has to be
fully formed, with a response code line, response-headers, and an
optional body. Persistent connections just save the client from having
to reconnect -- everything else is the same.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

18/02/2005, 08h53

Barry Margolin <barmar@alum.mit.edu> wrote in message news:<barmar-7CEB03.08193817022005@comcast.dca.giganews.com>...
> In article <e6443ee5.0502162240.7e190872@posting.google.com >,
> suyog.upadhye@wipro.com (suyog) wrote:
>
> > Hi All,
> >
> > Is it possible to get the full content of a file by using Range Header
> > in HTTP 1.1? Basically the idea is to use persistent connection with
> > the server and request for next chunk of specific byte range. Can
> > multiple Range requests can be sent to server, connecting only once?
>
> Yes. These are orthogonal features, and nothing precludes using them
> together.
>
> >
> > one more thing I am unable to understand is what is the minimum range
> > i can ask for?Sometimes the folowing error is appearing in the
> > responce. This error string appears after getting some responce (ie.
> > some chunks)
> >
> > <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
> > <html><head>
> > <title>501 Method Not Implemented</title>
> > </head><body>
> > <h1>Method Not Implemented</h1>
> > <p> to /index.html.en not supported.<br />
> > </p>
> > <hr>
> > <address>Apache/2.0.52 (Win32) Server at EC4SEMI-112316.wipro.com Port
> > 80</address>
> > </body></html>
> >
> > Basically the confusion is with, How the server will act on the
> > subsequent requests. Will it give the full responce (with date,server
> > name and all responce headers) for each request sent and then followed
> > by data? or it will simply gives responce line for first request only
> > and then only data(specified data in subsequent range requests) for
> > subsequent requests?
>
> Each request and response is independent. Every response has to be
> fully formed, with a response code line, response-headers, and an
> optional body. Persistent connections just save the client from having
> to reconnect -- everything else is the same.

Thanks for the suggestion.

The first request is served properly but on subsequent request it is
failing, I have traced the problem and have found that there will be
some more data remaining on the socket after the first request which
causes failure for the 2nd request

So can u please provide me some tips so that i can fix this error

18/02/2005, 08h53

Barry Margolin <barmar@alum.mit.edu> wrote in message news:<barmar-7CEB03.08193817022005@comcast.dca.giganews.com>...
> In article <e6443ee5.0502162240.7e190872@posting.google.com >,
> suyog.upadhye@wipro.com (suyog) wrote:
>
> > Hi All,
> >
> > Is it possible to get the full content of a file by using Range Header
> > in HTTP 1.1? Basically the idea is to use persistent connection with
> > the server and request for next chunk of specific byte range. Can
> > multiple Range requests can be sent to server, connecting only once?
>
> Yes. These are orthogonal features, and nothing precludes using them
> together.
>
> >
> > one more thing I am unable to understand is what is the minimum range
> > i can ask for?Sometimes the folowing error is appearing in the
> > responce. This error string appears after getting some responce (ie.
> > some chunks)
> >
> > <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
> > <html><head>
> > <title>501 Method Not Implemented</title>
> > </head><body>
> > <h1>Method Not Implemented</h1>
> > <p> to /index.html.en not supported.<br />
> > </p>
> > <hr>
> > <address>Apache/2.0.52 (Win32) Server at EC4SEMI-112316.wipro.com Port
> > 80</address>
> > </body></html>
> >
> > Basically the confusion is with, How the server will act on the
> > subsequent requests. Will it give the full responce (with date,server
> > name and all responce headers) for each request sent and then followed
> > by data? or it will simply gives responce line for first request only
> > and then only data(specified data in subsequent range requests) for
> > subsequent requests?
>
> Each request and response is independent. Every response has to be
> fully formed, with a response code line, response-headers, and an
> optional body. Persistent connections just save the client from having
> to reconnect -- everything else is the same.

Thanks for the suggestion.

The first request is served properly but on subsequent request it is
failing, I have traced the problem and have found that there will be
some more data remaining on the socket after the first request which
causes failure for the 2nd request

So can u please provide me some tips so that i can fix this error

18/02/2005, 14h07

In article <e6443ee5.0502180053.71e4fa52@posting.google.com >,
suyog.upadhye@wipro.com (suyog) wrote:

> Barry Margolin <barmar@alum.mit.edu> wrote in message
> news:<barmar-7CEB03.08193817022005@comcast.dca.giganews.com>...
> > Each request and response is independent. Every response has to be
> > fully formed, with a response code line, response-headers, and an
> > optional body. Persistent connections just save the client from having
> > to reconnect -- everything else is the same.
>
> Thanks for the suggestion.

What suggestion?

> The first request is served properly but on subsequent request it is
> failing, I have traced the problem and have found that there will be
> some more data remaining on the socket after the first request which
> causes failure for the 2nd request

More data on which socket? If it's on the server's socket, it sounds
like you're not putting the correct Content-Length: header in a POST or
PUT request. If it's on the client, it isn't reading the entire
response properly.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

18/02/2005, 14h07

In article <e6443ee5.0502180053.71e4fa52@posting.google.com >,
suyog.upadhye@wipro.com (suyog) wrote:

> Barry Margolin <barmar@alum.mit.edu> wrote in message
> news:<barmar-7CEB03.08193817022005@comcast.dca.giganews.com>...
> > Each request and response is independent. Every response has to be
> > fully formed, with a response code line, response-headers, and an
> > optional body. Persistent connections just save the client from having
> > to reconnect -- everything else is the same.
>
> Thanks for the suggestion.

What suggestion?

> The first request is served properly but on subsequent request it is
> failing, I have traced the problem and have found that there will be
> some more data remaining on the socket after the first request which
> causes failure for the 2nd request

More data on which socket? If it's on the server's socket, it sounds
like you're not putting the correct Content-Length: header in a POST or
PUT request. If it's on the client, it isn't reading the entire
response properly.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

17/02/2005, 06h40	#1
suyog Messages: n/a Hébergeur:	Multiple Range requests in HTTP 1.1 Hi All, Is it possible to get the full content of a file by using Range Header in HTTP 1.1? Basically the idea is to use persistent connection with the server and request for next chunk of specific byte range. Can multiple Range requests can be sent to server, connecting only once? one more thing I am unable to understand is what is the minimum range i can ask for?Sometimes the folowing error is appearing in the responce. This error string appears after getting some responce (ie. some chunks) <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>501 Method Not Implemented</title> </head><body> <h1>Method Not Implemented</h1> <p> to /index.html.en not supported.<br /> </p> <hr> <address>Apache/2.0.52 (Win32) Server at EC4SEMI-112316.wipro.com Port 80</address> </body></html> Basically the confusion is with, How the server will act on the subsequent requests. Will it give the full responce (with date,server name and all responce headers) for each request sent and then followed by data? or it will simply gives responce line for first request only and then only data(specified data in subsequent range requests) for subsequent requests? Any will be appriciated. Thanks.

17/02/2005, 13h19	#2
Barry Margolin Messages: n/a Hébergeur:	Re: Multiple Range requests in HTTP 1.1 In article <e6443ee5.0502162240.7e190872@posting.google.com >, suyog.upadhye@wipro.com (suyog) wrote: > Hi All, > > Is it possible to get the full content of a file by using Range Header > in HTTP 1.1? Basically the idea is to use persistent connection with > the server and request for next chunk of specific byte range. Can > multiple Range requests can be sent to server, connecting only once? Yes. These are orthogonal features, and nothing precludes using them together. > > one more thing I am unable to understand is what is the minimum range > i can ask for?Sometimes the folowing error is appearing in the > responce. This error string appears after getting some responce (ie. > some chunks) > > <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> > <html><head> > <title>501 Method Not Implemented</title> > </head><body> > <h1>Method Not Implemented</h1> > <p> to /index.html.en not supported.<br /> > </p> > <hr> > <address>Apache/2.0.52 (Win32) Server at EC4SEMI-112316.wipro.com Port > 80</address> > </body></html> > > Basically the confusion is with, How the server will act on the > subsequent requests. Will it give the full responce (with date,server > name and all responce headers) for each request sent and then followed > by data? or it will simply gives responce line for first request only > and then only data(specified data in subsequent range requests) for > subsequent requests? Each request and response is independent. Every response has to be fully formed, with a response code line, response-headers, and an optional body. Persistent connections just save the client from having to reconnect -- everything else is the same. -- Barry Margolin, barmar@alum.mit.edu Arlington, MA * PLEASE post questions in newsgroups, not directly to me *

17/02/2005, 13h19	#3
Barry Margolin Messages: n/a Hébergeur:	Re: Multiple Range requests in HTTP 1.1 In article <e6443ee5.0502162240.7e190872@posting.google.com >, suyog.upadhye@wipro.com (suyog) wrote: > Hi All, > > Is it possible to get the full content of a file by using Range Header > in HTTP 1.1? Basically the idea is to use persistent connection with > the server and request for next chunk of specific byte range. Can > multiple Range requests can be sent to server, connecting only once? Yes. These are orthogonal features, and nothing precludes using them together. > > one more thing I am unable to understand is what is the minimum range > i can ask for?Sometimes the folowing error is appearing in the > responce. This error string appears after getting some responce (ie. > some chunks) > > <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> > <html><head> > <title>501 Method Not Implemented</title> > </head><body> > <h1>Method Not Implemented</h1> > <p> to /index.html.en not supported.<br /> > </p> > <hr> > <address>Apache/2.0.52 (Win32) Server at EC4SEMI-112316.wipro.com Port > 80</address> > </body></html> > > Basically the confusion is with, How the server will act on the > subsequent requests. Will it give the full responce (with date,server > name and all responce headers) for each request sent and then followed > by data? or it will simply gives responce line for first request only > and then only data(specified data in subsequent range requests) for > subsequent requests? Each request and response is independent. Every response has to be fully formed, with a response code line, response-headers, and an optional body. Persistent connections just save the client from having to reconnect -- everything else is the same. -- Barry Margolin, barmar@alum.mit.edu Arlington, MA * PLEASE post questions in newsgroups, not directly to me *

18/02/2005, 08h53	#4
suyog Messages: n/a Hébergeur:	Re: Multiple Range requests in HTTP 1.1 Barry Margolin <barmar@alum.mit.edu> wrote in message news:<barmar-7CEB03.08193817022005@comcast.dca.giganews.com>... > In article <e6443ee5.0502162240.7e190872@posting.google.com >, > suyog.upadhye@wipro.com (suyog) wrote: > > > Hi All, > > > > Is it possible to get the full content of a file by using Range Header > > in HTTP 1.1? Basically the idea is to use persistent connection with > > the server and request for next chunk of specific byte range. Can > > multiple Range requests can be sent to server, connecting only once? > > Yes. These are orthogonal features, and nothing precludes using them > together. > > > > > one more thing I am unable to understand is what is the minimum range > > i can ask for?Sometimes the folowing error is appearing in the > > responce. This error string appears after getting some responce (ie. > > some chunks) > > > > <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> > > <html><head> > > <title>501 Method Not Implemented</title> > > </head><body> > > <h1>Method Not Implemented</h1> > > <p> to /index.html.en not supported.<br /> > > </p> > > <hr> > > <address>Apache/2.0.52 (Win32) Server at EC4SEMI-112316.wipro.com Port > > 80</address> > > </body></html> > > > > Basically the confusion is with, How the server will act on the > > subsequent requests. Will it give the full responce (with date,server > > name and all responce headers) for each request sent and then followed > > by data? or it will simply gives responce line for first request only > > and then only data(specified data in subsequent range requests) for > > subsequent requests? > > Each request and response is independent. Every response has to be > fully formed, with a response code line, response-headers, and an > optional body. Persistent connections just save the client from having > to reconnect -- everything else is the same. Thanks for the suggestion. The first request is served properly but on subsequent request it is failing, I have traced the problem and have found that there will be some more data remaining on the socket after the first request which causes failure for the 2nd request So can u please provide me some tips so that i can fix this error

18/02/2005, 08h53	#5
suyog Messages: n/a Hébergeur:	Re: Multiple Range requests in HTTP 1.1 Barry Margolin <barmar@alum.mit.edu> wrote in message news:<barmar-7CEB03.08193817022005@comcast.dca.giganews.com>... > In article <e6443ee5.0502162240.7e190872@posting.google.com >, > suyog.upadhye@wipro.com (suyog) wrote: > > > Hi All, > > > > Is it possible to get the full content of a file by using Range Header > > in HTTP 1.1? Basically the idea is to use persistent connection with > > the server and request for next chunk of specific byte range. Can > > multiple Range requests can be sent to server, connecting only once? > > Yes. These are orthogonal features, and nothing precludes using them > together. > > > > > one more thing I am unable to understand is what is the minimum range > > i can ask for?Sometimes the folowing error is appearing in the > > responce. This error string appears after getting some responce (ie. > > some chunks) > > > > <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> > > <html><head> > > <title>501 Method Not Implemented</title> > > </head><body> > > <h1>Method Not Implemented</h1> > > <p> to /index.html.en not supported.<br /> > > </p> > > <hr> > > <address>Apache/2.0.52 (Win32) Server at EC4SEMI-112316.wipro.com Port > > 80</address> > > </body></html> > > > > Basically the confusion is with, How the server will act on the > > subsequent requests. Will it give the full responce (with date,server > > name and all responce headers) for each request sent and then followed > > by data? or it will simply gives responce line for first request only > > and then only data(specified data in subsequent range requests) for > > subsequent requests? > > Each request and response is independent. Every response has to be > fully formed, with a response code line, response-headers, and an > optional body. Persistent connections just save the client from having > to reconnect -- everything else is the same. Thanks for the suggestion. The first request is served properly but on subsequent request it is failing, I have traced the problem and have found that there will be some more data remaining on the socket after the first request which causes failure for the 2nd request So can u please provide me some tips so that i can fix this error

18/02/2005, 14h07	#6
Barry Margolin Messages: n/a Hébergeur:	Re: Multiple Range requests in HTTP 1.1 In article <e6443ee5.0502180053.71e4fa52@posting.google.com >, suyog.upadhye@wipro.com (suyog) wrote: > Barry Margolin <barmar@alum.mit.edu> wrote in message > news:<barmar-7CEB03.08193817022005@comcast.dca.giganews.com>... > > Each request and response is independent. Every response has to be > > fully formed, with a response code line, response-headers, and an > > optional body. Persistent connections just save the client from having > > to reconnect -- everything else is the same. > > Thanks for the suggestion. What suggestion? > The first request is served properly but on subsequent request it is > failing, I have traced the problem and have found that there will be > some more data remaining on the socket after the first request which > causes failure for the 2nd request More data on which socket? If it's on the server's socket, it sounds like you're not putting the correct Content-Length: header in a POST or PUT request. If it's on the client, it isn't reading the entire response properly. -- Barry Margolin, barmar@alum.mit.edu Arlington, MA * PLEASE post questions in newsgroups, not directly to me *

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