| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
Aws.Core
Contents
- class Loggable a where
- data Response m a = Response {}
- readResponse :: MonadThrow n => Response m a -> n a
- readResponseIO :: MonadIO io => Response m a -> io a
- tellMetadata :: m -> Response m ()
- tellMetadataRef :: Monoid m => IORef m -> m -> IO ()
- mapMetadata :: (m -> n) -> Response m a -> Response n a
- type HTTPResponseConsumer a = Response (ResumableSource (ResourceT IO) ByteString) -> ResourceT IO a
- class Monoid (ResponseMetadata resp) => ResponseConsumer req resp where
- type ResponseMetadata resp
- responseConsumer :: req -> IORef (ResponseMetadata resp) -> HTTPResponseConsumer resp
- class AsMemoryResponse resp where
- type MemoryResponse resp :: *
- loadToMemory :: resp -> ResourceT IO (MemoryResponse resp)
- class ListResponse resp item | resp -> item where
- listResponse :: resp -> [item]
- newtype XmlException = XmlException {}
- newtype HeaderException = HeaderException {}
- newtype FormException = FormException {}
- newtype NoCredentialsException = NoCredentialsException {}
- readHex2 :: [Char] -> Maybe Word8
- elContent :: Text -> Cursor -> [Text]
- elCont :: Text -> Cursor -> [String]
- force :: MonadThrow m => String -> [a] -> m a
- forceM :: MonadThrow m => String -> [m a] -> m a
- textReadInt :: (MonadThrow m, Num a) => Text -> m a
- readInt :: (MonadThrow m, Num a) => String -> m a
- xmlCursorConsumer :: Monoid m => (Cursor -> Response m a) -> IORef m -> HTTPResponseConsumer a
- data SignedQuery = SignedQuery {
- sqMethod :: !Method
- sqProtocol :: !Protocol
- sqHost :: !ByteString
- sqPort :: !Int
- sqPath :: !ByteString
- sqQuery :: !Query
- sqDate :: !(Maybe UTCTime)
- sqAuthorization :: !(Maybe (IO ByteString))
- sqContentType :: !(Maybe ByteString)
- sqContentMd5 :: !(Maybe (Digest MD5))
- sqAmzHeaders :: !RequestHeaders
- sqOtherHeaders :: !RequestHeaders
- sqBody :: !(Maybe RequestBody)
- sqStringToSign :: !ByteString
- data NormalQuery
- data UriOnlyQuery
- queryToHttpRequest :: SignedQuery -> IO Request
- queryToUri :: SignedQuery -> ByteString
- data TimeInfo
- data AbsoluteTimeInfo
- = AbsoluteTimestamp { }
- | AbsoluteExpires { }
- fromAbsoluteTimeInfo :: AbsoluteTimeInfo -> UTCTime
- makeAbsoluteTimeInfo :: TimeInfo -> UTCTime -> AbsoluteTimeInfo
- data SignatureData = SignatureData {}
- signatureData :: TimeInfo -> Credentials -> IO SignatureData
- class SignQuery request where
- type ServiceConfiguration request :: * -> *
- signQuery :: request -> ServiceConfiguration request queryType -> SignatureData -> SignedQuery
- data AuthorizationHash
- amzHash :: AuthorizationHash -> ByteString
- signature :: Credentials -> AuthorizationHash -> ByteString -> ByteString
- authorizationV4 :: SignatureData -> AuthorizationHash -> ByteString -> ByteString -> ByteString -> ByteString -> IO ByteString
- queryList :: (a -> [(ByteString, ByteString)]) -> ByteString -> [a] -> [(ByteString, ByteString)]
- awsBool :: Bool -> ByteString
- awsTrue :: ByteString
- awsFalse :: ByteString
- fmtTime :: String -> UTCTime -> ByteString
- fmtRfc822Time :: UTCTime -> ByteString
- rfc822Time :: String
- fmtAmzTime :: UTCTime -> ByteString
- fmtTimeEpochSeconds :: UTCTime -> ByteString
- parseHttpDate :: String -> Maybe UTCTime
- httpDate1 :: String
- textHttpDate :: UTCTime -> Text
- iso8601UtcDate :: String
- class (SignQuery r, ResponseConsumer r a, Loggable (ResponseMetadata a)) => Transaction r a | r -> a
- class Transaction r a => IteratedTransaction r a | r -> a where
- nextIteratedRequest :: r -> a -> Maybe r
- data Credentials = Credentials {
- accessKeyID :: ByteString
- secretAccessKey :: ByteString
- v4SigningKeys :: IORef [V4Key]
- iamToken :: Maybe ByteString
- makeCredentials :: MonadIO io => ByteString -> ByteString -> io Credentials
- credentialsDefaultFile :: MonadIO io => io FilePath
- credentialsDefaultKey :: Text
- loadCredentialsFromFile :: MonadIO io => FilePath -> Text -> io (Maybe Credentials)
- loadCredentialsFromEnv :: MonadIO io => io (Maybe Credentials)
- loadCredentialsFromInstanceMetadata :: MonadIO io => io (Maybe Credentials)
- loadCredentialsFromEnvOrFile :: MonadIO io => FilePath -> Text -> io (Maybe Credentials)
- loadCredentialsFromEnvOrFileOrInstanceMetadata :: MonadIO io => FilePath -> Text -> io (Maybe Credentials)
- loadCredentialsDefault :: MonadIO io => io (Maybe Credentials)
- class DefaultServiceConfiguration config where
- defServiceConfig :: config
- debugServiceConfig :: config
- data Protocol
- defaultPort :: Protocol -> Int
- data Method
- httpMethod :: Method -> Method
Logging
Types that can be logged (textually).
Response
Metadata in responses
A response with metadata. Can also contain an error response, or
an internal error, via Attempt.
Response forms a Writer-like monad.
Constructors
| Response | |
Fields
| |
readResponse :: MonadThrow n => Response m a -> n a Source
Read a response result (if it's a success response, fail otherwise).
readResponseIO :: MonadIO io => Response m a -> io a Source
Read a response result (if it's a success response, fail otherwise). In MonadIO.
tellMetadata :: m -> Response m () Source
An empty response with some metadata.
tellMetadataRef :: Monoid m => IORef m -> m -> IO () Source
mapMetadata :: (m -> n) -> Response m a -> Response n a Source
Apply a function to the metadata.
Response data consumers
type HTTPResponseConsumer a = Response (ResumableSource (ResourceT IO) ByteString) -> ResourceT IO a Source
A full HTTP response parser. Takes HTTP status, response headers, and response body.
class Monoid (ResponseMetadata resp) => ResponseConsumer req resp where Source
Class for types that AWS HTTP responses can be parsed into.
The request is also passed for possibly required additional metadata.
Note that for debugging, there is an instance for ByteString.
Associated Types
type ResponseMetadata resp Source
Metadata associated with a response. Typically there is one metadata type for each AWS service.
Methods
responseConsumer :: req -> IORef (ResponseMetadata resp) -> HTTPResponseConsumer resp Source
Response parser. Takes the corresponding request, an IORef
for metadata, and HTTP response data.
Instances
Memory response
class AsMemoryResponse resp where Source
Class for responses that are fully loaded into memory
Associated Types
type MemoryResponse resp :: * Source
Methods
loadToMemory :: resp -> ResourceT IO (MemoryResponse resp) Source
Instances
List response
class ListResponse resp item | resp -> item where Source
Responses that have one main list in them, and perhaps some decoration.
Methods
listResponse :: resp -> [item] Source
Exception types
newtype XmlException Source
An error that occurred during XML parsing / validation.
Constructors
| XmlException | |
Fields | |
Instances
newtype HeaderException Source
An error that occurred during header parsing / validation.
Constructors
| HeaderException | |
Fields | |
Instances
newtype FormException Source
An error that occurred during form parsing / validation.
Constructors
| FormException | |
Fields | |
Instances
newtype NoCredentialsException Source
No credentials were found and an invariant was violated.
Constructors
| NoCredentialsException | |
Fields | |
Response deconstruction helpers
XML
elContent :: Text -> Cursor -> [Text] Source
A specific element (case-insensitive, ignoring namespace - sadly necessary), extracting only the textual contents.
force :: MonadThrow m => String -> [a] -> m a Source
Extract the first element from a parser result list, and throw an XmlException if the list is empty.
forceM :: MonadThrow m => String -> [m a] -> m a Source
Extract the first element from a monadic parser result list, and throw an XmlException if the list is empty.
textReadInt :: (MonadThrow m, Num a) => Text -> m a Source
Read an integer from a Text, throwing an XmlException on failure.
readInt :: (MonadThrow m, Num a) => String -> m a Source
Read an integer from a String, throwing an XmlException on failure.
xmlCursorConsumer :: Monoid m => (Cursor -> Response m a) -> IORef m -> HTTPResponseConsumer a Source
Create a complete HTTPResponseConsumer from a simple function that takes a Cursor to XML in the response
body.
This function is highly recommended for any services that parse relatively short XML responses. (If status and response headers are required, simply take them as function parameters, and pass them through to this function.)
Query
data SignedQuery Source
A pre-signed medium-level request object.
Constructors
| SignedQuery | |
Fields
| |
data NormalQuery Source
Tag type for normal queries.
Instances
data UriOnlyQuery Source
Tag type for URI-only queries.
Instances
queryToHttpRequest :: SignedQuery -> IO Request Source
Create a HTTP request from a SignedQuery object.
queryToUri :: SignedQuery -> ByteString Source
Create a URI fro a SignedQuery object.
Unused / incompatible fields will be silently ignored.
Expiration
Whether to restrict the signature validity with a plain timestamp, or with explicit expiration (absolute or relative).
data AbsoluteTimeInfo Source
Like TimeInfo, but with all relative times replaced by absolute UTC.
Constructors
| AbsoluteTimestamp | |
Fields | |
| AbsoluteExpires | |
Fields | |
Instances
fromAbsoluteTimeInfo :: AbsoluteTimeInfo -> UTCTime Source
Just the UTC time value.
makeAbsoluteTimeInfo :: TimeInfo -> UTCTime -> AbsoluteTimeInfo Source
Convert TimeInfo to AbsoluteTimeInfo given the current UTC time.
Signature
data SignatureData Source
Data that is always required for signing requests.
Constructors
| SignatureData | |
Fields
| |
signatureData :: TimeInfo -> Credentials -> IO SignatureData Source
Create signature data using the current system time.
class SignQuery request where Source
A "signable" request object. Assembles together the Query, and signs it in one go.
Associated Types
type ServiceConfiguration request :: * -> * Source
Additional information, like API endpoints and service-specific preferences.
Methods
signQuery :: request -> ServiceConfiguration request queryType -> SignatureData -> SignedQuery Source
Create a SignedQuery from a request, additional Info, and SignatureData.
Instances
data AuthorizationHash Source
Supported crypto hashes for the signature.
Constructors
| HmacSHA1 | |
| HmacSHA256 |
Instances
amzHash :: AuthorizationHash -> ByteString Source
Authorization hash identifier as expected by Amazon.
signature :: Credentials -> AuthorizationHash -> ByteString -> ByteString Source
Create a signature. Usually, AWS wants a specifically constructed string to be signed.
The signature is a HMAC-based hash of the string and the secret access key.
Arguments
| :: SignatureData | |
| -> AuthorizationHash | |
| -> ByteString | region, e.g. us-east-1 |
| -> ByteString | service, e.g. dynamodb |
| -> ByteString | SignedHeaders, e.g. content-type;host;x-amz-date;x-amz-target |
| -> ByteString | canonicalRequest (before hashing) |
| -> IO ByteString |
Use this to create the Authorization header to set into sqAuthorization.
See http://docs.aws.amazon.com/general/latest/gr/signature-version-4.html: you must create the
canonical request as explained by Step 1 and this function takes care of Steps 2 and 3.
Query construction helpers
queryList :: (a -> [(ByteString, ByteString)]) -> ByteString -> [a] -> [(ByteString, ByteString)] Source
queryList f prefix xs constructs a query list from a list of
elements xs, using a common prefix prefix, and a transformer
function f.
A dot (.) is interspersed between prefix and generated key.
Example:
queryList swap "pfx" [("a", "b"), ("c", "d")] evaluates to [("pfx.b", "a"), ("pfx.d", "c")]
(except with ByteString instead of String, of course).
awsBool :: Bool -> ByteString Source
A "true"/"false" boolean as requested by some services.
"true"
"false"
fmtTime :: String -> UTCTime -> ByteString Source
Format time according to a format string, as a ByteString.
fmtRfc822Time :: UTCTime -> ByteString Source
Format time in RFC 822 format.
fmtAmzTime :: UTCTime -> ByteString Source
Format time in yyyy-mm-ddThh-mm-ss format.
fmtTimeEpochSeconds :: UTCTime -> ByteString Source
Format time as seconds since the Unix epoch.
parseHttpDate :: String -> Maybe UTCTime Source
Parse HTTP-date (section 3.3.1 of RFC 2616)
textHttpDate :: UTCTime -> Text Source
Format (as Text) HTTP-date (section 3.3.1 of RFC 2616, first type - RFC1123-style)
Transactions
class (SignQuery r, ResponseConsumer r a, Loggable (ResponseMetadata a)) => Transaction r a | r -> a Source
Associates a request type and a response type in a bi-directional way.
This allows the type-checker to infer the response type when given the request type and vice versa.
Note that the actual request generation and response parsing
resides in SignQuery and ResponseConsumer respectively.
Instances
class Transaction r a => IteratedTransaction r a | r -> a where Source
A transaction that may need to be split over multiple requests, for example because of upstream response size limits.
Methods
nextIteratedRequest :: r -> a -> Maybe r Source
Instances
Credentials
data Credentials Source
AWS access credentials.
Constructors
| Credentials | |
Fields
| |
Instances
Arguments
| :: MonadIO io | |
| => ByteString | AWS Access Key ID |
| -> ByteString | AWS Secret Access Key |
| -> io Credentials |
credentialsDefaultFile :: MonadIO io => io FilePath Source
The file where access credentials are loaded, when using loadCredentialsDefault.
Value: directory/.aws-keys
credentialsDefaultKey :: Text Source
The key to be used in the access credential file that is loaded, when using loadCredentialsDefault.
Value: default
loadCredentialsFromFile :: MonadIO io => FilePath -> Text -> io (Maybe Credentials) Source
Load credentials from a (text) file given a key name.
The file consists of a sequence of lines, each in the following format:
keyName awsKeyID awsKeySecret
loadCredentialsFromEnv :: MonadIO io => io (Maybe Credentials) Source
Load credentials from the environment variables AWS_ACCESS_KEY_ID and AWS_ACCESS_KEY_SECRET
(or AWS_SECRET_ACCESS_KEY), if possible.
loadCredentialsFromInstanceMetadata :: MonadIO io => io (Maybe Credentials) Source
loadCredentialsFromEnvOrFile :: MonadIO io => FilePath -> Text -> io (Maybe Credentials) Source
Load credentials from environment variables if possible, or alternatively from a file with a given key name.
See loadCredentialsFromEnv and loadCredentialsFromFile for details.
loadCredentialsFromEnvOrFileOrInstanceMetadata :: MonadIO io => FilePath -> Text -> io (Maybe Credentials) Source
Load credentials from environment variables if possible, or alternatively from the instance metadata store, or alternatively from a file with a given key name.
See loadCredentialsFromEnv, loadCredentialsFromFile and loadCredentialsFromInstanceMetadata for details.
loadCredentialsDefault :: MonadIO io => io (Maybe Credentials) Source
Load credentials from environment variables if possible, or alternative from the default file with the default key name.
Default file: directory/.aws-keys
Default key name: default
See loadCredentialsFromEnv and loadCredentialsFromFile for details.
Service configuration
class DefaultServiceConfiguration config where Source
Default configuration for a specific service.
Minimal complete definition
Methods
defServiceConfig :: config Source
Default service configuration.
debugServiceConfig :: config Source
Default debugging-only configuration. (Normally using HTTP instead of HTTPS for easier debugging.)
Instances
HTTP types
Protocols supported by AWS. Currently, all AWS services use the HTTP or HTTPS protocols.
defaultPort :: Protocol -> Int Source
The default port to be used for a protocol if no specific port is specified.
Request method. Not all request methods are supported by all services.
Constructors
| Head | HEAD method. Put all request parameters in a query string and HTTP headers. |
| Get | GET method. Put all request parameters in a query string and HTTP headers. |
| PostQuery | POST method. Put all request parameters in a query string and HTTP headers, but send the query string as a POST payload |
| Post | POST method. Sends a service- and request-specific request body. |
| Put | PUT method. |
| Delete | DELETE method. |
httpMethod :: Method -> Method Source
HTTP method associated with a request method.