HTTP 1 0 vs 1 1

Question

Could somebody give me a brief overview of the differences between HTTP 1 0 and HTTP 1 1   I ve spent some time with both of the RFCs  but haven t been able to pull out a lot of difference between them   Wikipedia says this   HTTP 1 1  1997-1999  Current version  persistent connections enabled by default and works well with proxies  Also supports request pipelining  allowing multiple requests to be sent at the same time  allowing the server to prepare for the workload and potentially transfer the requested resources more quickly to the client   But that doesn t mean a lot to me   I realize this is a somewhat complicated subject  so I m not expecting a full answer  but can someone give me a brief overview of the differences at a bit lower level  By this I mean that I m looking for the info I would need to know to implement either an HTTP server or application  I m mostly looking for a nudge in the right direction so that I can figure it out on my own

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For trivial applications  e g  sporadically retrieving a temperature value from a web-enabled thermometer  HTTP 1 0 is fine for both a client and a server   You can write a bare-bones socket-based HTTP 1 0 client or server in about 20 lines of code   For more complicated scenarios HTTP 1 1 is the way to go   Expect a 3 to 5-fold increase in code size for dealing with the intricacies of the more complex HTTP 1 1 protocol   The complexity mainly comes  because in HTTP 1 1 you will need to create  parse  and respond to various headers   You can shield your application from this complexity by having a client use an HTTP library  or server use a web application server

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Proxy support and the Host field   HTTP 1 1 has a required Host header by spec   HTTP 1 0 does not officially require a Host header  but it doesn t hurt to add one  and many applications  proxies  expect to see the Host header regardless of the protocol version   Example   GET   HTTP 1 1 Host  www blahblahblahblah com   This header is useful because it allows you to route a message through proxy servers  and also because your web server can distinguish between different sites on the same server   So this means if you have blahblahlbah com and helohelohelo com both pointing to the same IP   Your web server can use the Host field to distinguish which site the client machine wants    Persistent connections   HTTP 1 1 also allows you to have persistent connections which means that you can have more than one request response on the same HTTP connection    In HTTP 1 0 you had to open a new connection for each request response pair   And after each response the connection would be closed    This lead to some big efficiency problems because of TCP Slow Start   OPTIONS method   HTTP 1 1 introduces the OPTIONS method   An HTTP client can use this method to determine the abilities of the HTTP server   It s mostly used for Cross Origin Resource Sharing in web applications   Caching   HTTP 1 0 had support for caching via the header  If-Modified-Since   HTTP 1 1 expands on the caching support a lot by using something called  entity tag    If 2 resources are the same  then they will have the same entity tags    HTTP 1 1 also adds the If-Unmodified-Since  If-Match  If-None-Match conditional headers    There are also further additions relating to caching like the Cache-Control header    100 Continue status   There is a new return code in HTTP 1 1 100 Continue   This is to prevent a client from sending a large request when that client is not even sure if the server can process the request  or is authorized to process the request   In this case the client sends only the headers  and the server will tell the client 100 Continue  go ahead with the body    Much more    Digest authentication and proxy authentication Extra new status codes Chunked transfer encoding Connection header Enhanced compression support Much much more

User · Answer

For trivial applications  e g  sporadically retrieving a temperature value from a web-enabled thermometer  HTTP 1 0 is fine for both a client and a server   You can write a bare-bones socket-based HTTP 1 0 client or server in about 20 lines of code   For more complicated scenarios HTTP 1 1 is the way to go   Expect a 3 to 5-fold increase in code size for dealing with the intricacies of the more complex HTTP 1 1 protocol   The complexity mainly comes  because in HTTP 1 1 you will need to create  parse  and respond to various headers   You can shield your application from this complexity by having a client use an HTTP library  or server use a web application server

User · Answer

A key compatibility issue is support for persistent connections   I recently worked on a server that  supported  HTTP 1 1  yet failed to close the connection when a client sent an HTTP 1 0 request   When writing a server that supports HTTP 1 1  be sure it also works well with HTTP 1 0-only clients

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HTTP 1 1 is the latest version of Hypertext Transfer Protocol  the World Wide Web application protocol that runs on top of the Internet s TCP IP suite of protocols  compare to HTTP 1 0   HTTP 1 1 provides faster delivery of Web pages than the original HTTP and reduces Web traffic   Web traffic Example  For example  if you are accessing a server  At the same time so many users are accessing the server for the data  Then there is a chance for hanging the Server  This is Web traffic

User · Answer

For trivial applications  e g  sporadically retrieving a temperature value from a web-enabled thermometer  HTTP 1 0 is fine for both a client and a server   You can write a bare-bones socket-based HTTP 1 0 client or server in about 20 lines of code   For more complicated scenarios HTTP 1 1 is the way to go   Expect a 3 to 5-fold increase in code size for dealing with the intricacies of the more complex HTTP 1 1 protocol   The complexity mainly comes  because in HTTP 1 1 you will need to create  parse  and respond to various headers   You can shield your application from this complexity by having a client use an HTTP library  or server use a web application server

User · Answer

HTTP 1 0  1994    It is still in use Can be used by a client that cannot deal with chunked  or compressed  server replies     HTTP 1 1  1996- 2015    Formalizes many extensions to version 1 0 Supports persistent and pipelined connections Supports chunked transfers  compression decompression Supports virtual hosting  a server with a single IP Address hosting multiple domains  Supports multiple languages Supports byte-range transfers  useful for resuming interrupted data transfers   HTTP 1 1 is an enhancement of HTTP 1 0  The following lists the four major improvements    Efficient use of IP addresses  by allowing multiple domains to be served from a single IP address  Faster response  by allowing a web browser to send multiple requests over a single persistent connection  Faster response for dynamically-generated pages  by support for chunked encoding  which allows a response to be sent before its total length is known  Faster response and great bandwidth savings  by adding cache support

User · Answer

A key compatibility issue is support for persistent connections   I recently worked on a server that  supported  HTTP 1 1  yet failed to close the connection when a client sent an HTTP 1 0 request   When writing a server that supports HTTP 1 1  be sure it also works well with HTTP 1 0-only clients

User · Answer

HTTP 1 1 comes with the host header in its specification while the HTTP 1 0 doesn t officially have a host header  but it doesn t refuse to add one   The host header is useful because it allows the client to route a  message throughout the proxy server  and the major difference between 1 0 and 1 1 versions HTTP are    HTTP 1 1 comes with persistent connections which define that we can have more than one request or response on the same HTTP connection  while in HTTP 1 0 you have to open a new connection for each request and response In HTTP 1 0 it has a pragma while in HTTP 1 1 it has Cache-Control this is similar to pragma

User · Answer

One of the first differences that I can recall from top of my head are multiple domains running in the same server  partial resource retrieval  this allows you to retrieve and speed up the download of a resource  it s what almost every download accelerator does    If you want to develop an application like a website or similar  you don t need to worry too much about the differences but you should know the difference between GET and POST verbs at least   Now if you want to develop a browser then yes  you will have to know the complete protocol as well as if you are trying to develop a HTTP server   If you are only interested in knowing the HTTP protocol I would recommend you starting with HTTP 1 1 instead of 1 0

User · Answer

HTTP 1 1 is the latest version of Hypertext Transfer Protocol  the World Wide Web application protocol that runs on top of the Internet s TCP IP suite of protocols  compare to HTTP 1 0   HTTP 1 1 provides faster delivery of Web pages than the original HTTP and reduces Web traffic   Web traffic Example  For example  if you are accessing a server  At the same time so many users are accessing the server for the data  Then there is a chance for hanging the Server  This is Web traffic

User · Answer

Proxy support and the Host field   HTTP 1 1 has a required Host header by spec   HTTP 1 0 does not officially require a Host header  but it doesn t hurt to add one  and many applications  proxies  expect to see the Host header regardless of the protocol version   Example   GET   HTTP 1 1 Host  www blahblahblahblah com   This header is useful because it allows you to route a message through proxy servers  and also because your web server can distinguish between different sites on the same server   So this means if you have blahblahlbah com and helohelohelo com both pointing to the same IP   Your web server can use the Host field to distinguish which site the client machine wants    Persistent connections   HTTP 1 1 also allows you to have persistent connections which means that you can have more than one request response on the same HTTP connection    In HTTP 1 0 you had to open a new connection for each request response pair   And after each response the connection would be closed    This lead to some big efficiency problems because of TCP Slow Start   OPTIONS method   HTTP 1 1 introduces the OPTIONS method   An HTTP client can use this method to determine the abilities of the HTTP server   It s mostly used for Cross Origin Resource Sharing in web applications   Caching   HTTP 1 0 had support for caching via the header  If-Modified-Since   HTTP 1 1 expands on the caching support a lot by using something called  entity tag    If 2 resources are the same  then they will have the same entity tags    HTTP 1 1 also adds the If-Unmodified-Since  If-Match  If-None-Match conditional headers    There are also further additions relating to caching like the Cache-Control header    100 Continue status   There is a new return code in HTTP 1 1 100 Continue   This is to prevent a client from sending a large request when that client is not even sure if the server can process the request  or is authorized to process the request   In this case the client sends only the headers  and the server will tell the client 100 Continue  go ahead with the body    Much more    Digest authentication and proxy authentication Extra new status codes Chunked transfer encoding Connection header Enhanced compression support Much much more

User · Answer

One of the first differences that I can recall from top of my head are multiple domains running in the same server  partial resource retrieval  this allows you to retrieve and speed up the download of a resource  it s what almost every download accelerator does    If you want to develop an application like a website or similar  you don t need to worry too much about the differences but you should know the difference between GET and POST verbs at least   Now if you want to develop a browser then yes  you will have to know the complete protocol as well as if you are trying to develop a HTTP server   If you are only interested in knowing the HTTP protocol I would recommend you starting with HTTP 1 1 instead of 1 0

User · Answer

A key compatibility issue is support for persistent connections   I recently worked on a server that  supported  HTTP 1 1  yet failed to close the connection when a client sent an HTTP 1 0 request   When writing a server that supports HTTP 1 1  be sure it also works well with HTTP 1 0-only clients

User · Answer

Proxy support and the Host field   HTTP 1 1 has a required Host header by spec   HTTP 1 0 does not officially require a Host header  but it doesn t hurt to add one  and many applications  proxies  expect to see the Host header regardless of the protocol version   Example   GET   HTTP 1 1 Host  www blahblahblahblah com   This header is useful because it allows you to route a message through proxy servers  and also because your web server can distinguish between different sites on the same server   So this means if you have blahblahlbah com and helohelohelo com both pointing to the same IP   Your web server can use the Host field to distinguish which site the client machine wants    Persistent connections   HTTP 1 1 also allows you to have persistent connections which means that you can have more than one request response on the same HTTP connection    In HTTP 1 0 you had to open a new connection for each request response pair   And after each response the connection would be closed    This lead to some big efficiency problems because of TCP Slow Start   OPTIONS method   HTTP 1 1 introduces the OPTIONS method   An HTTP client can use this method to determine the abilities of the HTTP server   It s mostly used for Cross Origin Resource Sharing in web applications   Caching   HTTP 1 0 had support for caching via the header  If-Modified-Since   HTTP 1 1 expands on the caching support a lot by using something called  entity tag    If 2 resources are the same  then they will have the same entity tags    HTTP 1 1 also adds the If-Unmodified-Since  If-Match  If-None-Match conditional headers    There are also further additions relating to caching like the Cache-Control header    100 Continue status   There is a new return code in HTTP 1 1 100 Continue   This is to prevent a client from sending a large request when that client is not even sure if the server can process the request  or is authorized to process the request   In this case the client sends only the headers  and the server will tell the client 100 Continue  go ahead with the body    Much more    Digest authentication and proxy authentication Extra new status codes Chunked transfer encoding Connection header Enhanced compression support Much much more

User · Answer

For trivial applications  e g  sporadically retrieving a temperature value from a web-enabled thermometer  HTTP 1 0 is fine for both a client and a server   You can write a bare-bones socket-based HTTP 1 0 client or server in about 20 lines of code   For more complicated scenarios HTTP 1 1 is the way to go   Expect a 3 to 5-fold increase in code size for dealing with the intricacies of the more complex HTTP 1 1 protocol   The complexity mainly comes  because in HTTP 1 1 you will need to create  parse  and respond to various headers   You can shield your application from this complexity by having a client use an HTTP library  or server use a web application server

User · Answer

HTTP 1 0  1994    It is still in use Can be used by a client that cannot deal with chunked  or compressed  server replies     HTTP 1 1  1996- 2015    Formalizes many extensions to version 1 0 Supports persistent and pipelined connections Supports chunked transfers  compression decompression Supports virtual hosting  a server with a single IP Address hosting multiple domains  Supports multiple languages Supports byte-range transfers  useful for resuming interrupted data transfers   HTTP 1 1 is an enhancement of HTTP 1 0  The following lists the four major improvements    Efficient use of IP addresses  by allowing multiple domains to be served from a single IP address  Faster response  by allowing a web browser to send multiple requests over a single persistent connection  Faster response for dynamically-generated pages  by support for chunked encoding  which allows a response to be sent before its total length is known  Faster response and great bandwidth savings  by adding cache support

User · Answer

One of the first differences that I can recall from top of my head are multiple domains running in the same server  partial resource retrieval  this allows you to retrieve and speed up the download of a resource  it s what almost every download accelerator does    If you want to develop an application like a website or similar  you don t need to worry too much about the differences but you should know the difference between GET and POST verbs at least   Now if you want to develop a browser then yes  you will have to know the complete protocol as well as if you are trying to develop a HTTP server   If you are only interested in knowing the HTTP protocol I would recommend you starting with HTTP 1 1 instead of 1 0

User · Answer

Proxy support and the Host field   HTTP 1 1 has a required Host header by spec   HTTP 1 0 does not officially require a Host header  but it doesn t hurt to add one  and many applications  proxies  expect to see the Host header regardless of the protocol version   Example   GET   HTTP 1 1 Host  www blahblahblahblah com   This header is useful because it allows you to route a message through proxy servers  and also because your web server can distinguish between different sites on the same server   So this means if you have blahblahlbah com and helohelohelo com both pointing to the same IP   Your web server can use the Host field to distinguish which site the client machine wants    Persistent connections   HTTP 1 1 also allows you to have persistent connections which means that you can have more than one request response on the same HTTP connection    In HTTP 1 0 you had to open a new connection for each request response pair   And after each response the connection would be closed    This lead to some big efficiency problems because of TCP Slow Start   OPTIONS method   HTTP 1 1 introduces the OPTIONS method   An HTTP client can use this method to determine the abilities of the HTTP server   It s mostly used for Cross Origin Resource Sharing in web applications   Caching   HTTP 1 0 had support for caching via the header  If-Modified-Since   HTTP 1 1 expands on the caching support a lot by using something called  entity tag    If 2 resources are the same  then they will have the same entity tags    HTTP 1 1 also adds the If-Unmodified-Since  If-Match  If-None-Match conditional headers    There are also further additions relating to caching like the Cache-Control header    100 Continue status   There is a new return code in HTTP 1 1 100 Continue   This is to prevent a client from sending a large request when that client is not even sure if the server can process the request  or is authorized to process the request   In this case the client sends only the headers  and the server will tell the client 100 Continue  go ahead with the body    Much more    Digest authentication and proxy authentication Extra new status codes Chunked transfer encoding Connection header Enhanced compression support Much much more

User · Answer

One of the first differences that I can recall from top of my head are multiple domains running in the same server  partial resource retrieval  this allows you to retrieve and speed up the download of a resource  it s what almost every download accelerator does    If you want to develop an application like a website or similar  you don t need to worry too much about the differences but you should know the difference between GET and POST verbs at least   Now if you want to develop a browser then yes  you will have to know the complete protocol as well as if you are trying to develop a HTTP server   If you are only interested in knowing the HTTP protocol I would recommend you starting with HTTP 1 1 instead of 1 0

User · Answer

A key compatibility issue is support for persistent connections   I recently worked on a server that  supported  HTTP 1 1  yet failed to close the connection when a client sent an HTTP 1 0 request   When writing a server that supports HTTP 1 1  be sure it also works well with HTTP 1 0-only clients

User · Answer

HTTP 1 1 comes with the host header in its specification while the HTTP 1 0 doesn t officially have a host header  but it doesn t refuse to add one   The host header is useful because it allows the client to route a  message throughout the proxy server  and the major difference between 1 0 and 1 1 versions HTTP are    HTTP 1 1 comes with persistent connections which define that we can have more than one request or response on the same HTTP connection  while in HTTP 1 0 you have to open a new connection for each request and response In HTTP 1 0 it has a pragma while in HTTP 1 1 it has Cache-Control this is similar to pragma

[http] HTTP 1.0 vs 1.1

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