c# - Azure - call Storage rest api for list blobs -

what trying connect azure storage rest api list blobs. ref: http://msdn.microsoft.com/en-us/library/windowsazure/dd135734.aspx

i have tried follow http://msdn.microsoft.com/en-us/library/windowsazure/dd179428.aspx in order specify authorization header 403 error - forbidden.

code:

uri address = new uri("https://account.blob.core.windows.net/$logs?restype=container&comp=list"); httpwebrequest req = (httpwebrequest)httpwebrequest.create(address); req.headers["x-ms-date"] = "2013-09-04"; req.headers["x-ms-version"] = "2012-02-12"; req.method = "get";  string stringtosign =  "get\n"     + "\n" // content encoding     + "\n" // content language     + "\n" // content length     + "\n" // content md5     + "\n" // content type     + "\n" // date     + "\n" // if modified since     + "\n" // if match     + "\n" // if none match     + "\n" // if unmodified since     + "\n" // range     + "x-ms-date: 2013-09-04\nx-ms-version:2012-02-12\n" // headers     + "/account/blob\ncomp:list\nrestype:container"; // resources  string accountname = "account"; string key = convert.tobase64string(encoding.default.getbytes(stringtosign)); req.headers["authorization"] = string.format("sharedkey {0}:{1}", accountname, key);  httpwebresponse resp = req.getresponse() httpwebresponse; 

can see mistakes? there tool can generate key? 1 thing not sure of encoding/hashing string correctly.

thanks, andrew

update latest code. code gives me forbidden error.

datetime dt = datetime.utcnow; string stringtosign = "get\n"     + "\n" // content encoding     + "\n" // content language     + "\n" // content length     + "\n" // content md5     + "\n" // content type     + "\n" // date     + "\n" // if modified since     + "\n" // if match     + "\n" // if none match     + "\n" // if unmodified since     + "\n" // range     + "x-ms-date: " + dt.tostring("r") + "\nx-ms-version:2012-02-12\n" // headers     + "/account/$logs\ncomp:list\nrestype:container";  string auth = signthis(stringtosign, "accountkey", "account"); string method = "get"; string urlpath = "https://account.blob.core.windows.net/$logs?restype=container&comp=list"; uri uri = new uri(urlpath); httpwebrequest request = (httpwebrequest)webrequest.create(uri); request.method = method; request.headers.add("x-ms-date", dt.tostring("r")); request.headers.add("x-ms-version", "2012-02-12"); request.headers.add("authorization", auth);  using (httpwebresponse response = (httpwebresponse)request.getresponse()) { } 

there issues code above. before that, first thing need key storage account. can windows azure portal. click on storage account name in portal , click on "manage access keys" shown in screenshot below:

now issues:

the way you're creating authorization header incorrect. creating authorization header, need account name, account key , stringtosign code above. try code:

private static string signthis(string stringtosign, string key, string account)         {             string signature = string.empty;             byte[] unicodekey = convert.frombase64string(key);             using (hmacsha256 hmacsha256 = new hmacsha256(unicodekey))             {                 byte[] datatohmac = system.text.encoding.utf8.getbytes(canonicalizedstring);                 signature = convert.tobase64string(hmacsha256.computehash(datatohmac));             }              string authorizationheader = string.format(                   cultureinfo.invariantculture,                   "{0} {1}:{2}",                   "sharedkey",                   account,                   signature);              return authorizationheader;         } 

the function above provide authorization header need pass authorization.

2nd thing noticed in code stringtosign, you're not passing container name. stringtosign should be:

string stringtosign =  "get\n"     + "\n" // content encoding     + "\n" // content language     + "\n" // content length     + "\n" // content md5     + "\n" // content type     + "\n" // date     + "\n" // if modified since     + "\n" // if match     + "\n" // if none match     + "\n" // if unmodified since     + "\n" // range     + "x-ms-date: 2013-09-04\nx-ms-version:2012-02-12\n" // headers     + "/account/$logs\ncomp:list\nrestype:container"; // resources  

you mentioned you're quite new windows azure. if may suggest - implementing rest api has been done number of folks earlier also. please take @ have done instead of trying same thing again. may find these links useful:

http://convective.wordpress.com/2010/08/18/examples-of-the-windows-azure-storage-services-rest-api/

http://azurestoragesamples.codeplex.com/ - @ rest api implementation in project.

update

here's working code (just change account name, key , container name)

static void listcontainers() {     string account = "account";     string key = "key";     string container = "$logs";     datetime dt = datetime.utcnow;     string stringtosign = string.format("get\n"         + "\n" // content encoding         + "\n" // content language         + "\n" // content length         + "\n" // content md5         + "\n" // content type         + "\n" // date         + "\n" // if modified since         + "\n" // if match         + "\n" // if none match         + "\n" // if unmodified since         + "\n" // range         + "x-ms-date:" + dt.tostring("r") + "\nx-ms-version:2012-02-12\n" // headers         + "/{0}/{1}\ncomp:list\nrestype:container", account, container);      string auth = signthis(stringtosign, key, account);     string method = "get";     string urlpath = string.format("https://{0}.blob.core.windows.net/{1}?restype=container&comp=list", account, container);     uri uri = new uri(urlpath);     httpwebrequest request = (httpwebrequest)webrequest.create(uri);     request.method = method;     request.headers.add("x-ms-date", dt.tostring("r"));     request.headers.add("x-ms-version", "2012-02-12");     request.headers.add("authorization", auth);      using (httpwebresponse response = (httpwebresponse)request.getresponse())     {     } } 

hope helps.