Get object through Amazon S3 rest

 

Amazon S3 get files in rest mode see API http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectGET.html

Use C # To construct the following request

 
GET/objectname HTTP/1.1 HOST: bucketname. s3.amazonaws. comdate: dateauthorization: signaturevaluerange: bytes = byte_range
 

PseudoCode:

 1 Httpwebrequest request = webrequest. Create ( "  URL  " ) As  Httpwebrequest;  2 Webheadercollection headers = (RequestAs  Httpwebrequest). headers;  3              4                   String  Httpdate  5 = Datetime. utcnow. tostring ( "  DDD, DD Mmm yyyy hh: mm: SS  " , System. Globalization. datetimeformatinfo. invariantinfo) + "  GMT  "  ;  6  7               8                   String Canonicalstring = "  Put/test1.doc \ n X-AMZ-Date:  " + Httpdate + "  \ N/  "  ;  9                10 Encoding AE = New  Utf8encoding ();  11              12 Hmacsha1 Signature = New  Hmacsha1 ();  13              14 Signature. Key = AE. getbytes ( "  Serectid  "  );  15                   Byte [] Bytes = AE. getbytes (canonicalstring );  16                   Byte [] Morebytes =Signature. computehash (bytes );  17             18                   String Encodedcanonical = Convert. tobase64string (morebytes );  19   20 Headers. Add ( "  Authorization  " , "  AWS accessid  " + "  : " + Encodedcanonical );  21                22 Request. method = "  Put  "  ;  23 Request. Date = Datetime. utcnow;  24                25                   String Postdata = @"  Test-1.doc "  ;  26                   Byte [] Bytearray = Encoding. utf8.getbytes (postdata );  27                 28 Request. contenttype = "  Text/plain  " ; //  "Application/X-WWW-form-urlencoded ";  29                 30 Request. contentlength =Bytearray. length;  31              32 Stream datastream = Request. getrequeststream ();  33               34 Datastream. Write (bytearray, 0  , Bytearray. Length );  35             36   Datastream. Close ();  37              38 Webresponse response =Request. getresponse ();  39            40   Console. writeline (httpwebresponse) Response). statusdescription );  41                 42 Datastream = Response. getresponsestream ();  43                 44 Streamreader reader = New  Streamreader (datastream );  45             46                   String Responsefromserver = Reader. readtoend ();  47              48   Reader. Close ();  49   Datastream. Close ();  50 Response. Close ();