Fable.PowerPack

The interanl type that represents a value returned as a result of evaluating a step of an asynchronous sequence

An asynchronous sequence represents a delayed computation that can be started to produce either Cons value consisting of the next element of the sequence (head) together with the next asynchronous sequence (tail) or a special value representing the end of the sequence (Nil)

The promise function receives two other function parameters: success and fail

Asynchronous for loop - for all elements from the input sequence, generate all elements produced by the body (asynchronously). See also the PromiseSeq.collect function.

For loop that iterates over a synchronous sequence (and generates all elements generated by the asynchronous body)

Computation builder that allows creating of asynchronous sequences using the 'promiseSeq { ... }' syntax

Skips the first N elements of an asynchronous sequence and then returns the rest of the sequence unmodified.

Returns the first N elements of an asynchronous sequence

Skips elements from an asynchronous sequence while the specified predicate holds and then returns the rest of the sequence. The predicate is evaluated asynchronously.

Returns elements from an asynchronous sequence while the specified predicate holds. The predicate is evaluated synchronously.

Skips elements from an asynchronous sequence while the specified predicate holds and then returns the rest of the sequence. The predicate is evaluated asynchronously.

Returns elements from an asynchronous sequence while the specified predicate holds. The predicate is evaluated asynchronously.

Same as PromiseSeq.filterAsync, but the specified predicate is synchronous and processes the input element immediately.

Same as PromiseSeq.chooseAsync, but the specified function is synchronous and processes the input element immediately.

Same as PromiseSeq.iterAsync, but the specified function is synchronous and performs the side-effect immediately.

Same as PromiseSeq.mapAsync, but the specified function is synchronous and returns the result of projection immediately.

Same as PromiseSeq.scanAsync, but the specified function is synchronous and returns the result of aggregation immediately.

Same as PromiseSeq.foldAsync, but the specified function is synchronous and returns the result of aggregation immediately.

Aggregates the elements of the input asynchronous sequence using the specified 'aggregation' function. The result is an asynchronous workflow that returns the final result. The aggregation function is asynchronous (and the input sequence will be asked for the next element after the processing of an element completes).

Returns an asynchronous sequence that returns pairs containing an element from the input sequence and its predecessor. Empty sequence is returned for singleton input sequence.

Iterates over the input sequence and calls the specified function for every value (to perform some side-effect asynchronously). The specified function is asynchronous (and the input sequence will be asked for the next element after the processing of an element completes).

Aggregates the elements of the input asynchronous sequence using the specified 'aggregation' function. The result is an asynchronous sequence of intermediate aggregation result. The aggregation function is asynchronous (and the input sequence will be asked for the next element after the processing of an element completes).

Asynchronously returns the first element that was generated by the given asynchronous sequence (or the specified default value).

Asynchronously returns the last element that was generated by the given asynchronous sequence (or the specified default value).

Builds a new asynchronous sequence whose elements are those from the input sequence for which the specified function returned true. The specified function is asynchronous (and the input sequence will be asked for the next element after the processing of an element completes).

Asynchronously iterates over the input sequence and generates 'x' for every input element for which the specified asynchronous function returned 'Some(x)' The specified function is asynchronous (and the input sequence will be asked for the next element after the processing of an element completes).

Builds a new asynchronous sequence whose elements are generated by applying the specified function to all elements of the input sequence. The specified function is asynchronous (and the input sequence will be asked for the next element after the processing of an element completes).

Creates an asynchronou sequence that iterates over the given input sequence. For every input element, it calls the the specified function and iterates over all elements generated by that asynchronous sequence. This is the 'bind' operation of the computation expression (exposed using the 'for' keyword in promiseSeq computation).

Implements the 'TryFinally' functionality for computation builder

Implements the 'TryWith' functionality for computation builder

Tries to get the next element of an asynchronous sequence and returns either the value or an exception

Builds an asynchronou sequence using the computation builder syntax

Yields all elements of the first asynchronous sequence and then all elements of the second asynchronous sequence.

Creates an asynchronous sequence that generates a single element and then ends

Creates an empty asynchronou sequence that immediately ends

Module with helper functions for working with asynchronous sequences

Builds an asynchronou sequence using the computation builder syntax

Sends a HTTP patch with the record serialized as JSON. This function already sets the HTTP Method to PATCH sets the json into the body.

Sends a HTTP post with the record serialized as JSON. This function already sets the HTTP Method to POST sets the json into the body.

Retrieves data from the specified resource, parses the json and returns the data as an object of type 'T.

Retrieves data from the specified resource.

Uses a Request object as request info

Uses a simple Url as string to create the request info

Returns the response URL

Returns the HTTP status message

Returns the HTTP status code

Verifies that the fetch was successful

Returns the headers objct

Cross-site scripting (XSS) filter

Recommends the preferred rendering engine (often a backward-compatibility mode) to use to display the content. Also used to activate Chrome Frame in Internet Explorer.

Correlates HTTP requests between a client and server.

Specifies the technology (e.g. ASP.NET, PHP, JBoss) supporting the web application (version details are often in X-Runtime, X-Version, or X-AspNet-Version)

Clickjacking protection: deny - no rendering within a frame, sameorigin - no rendering if origin mismatch, allow-from - allow from specified location, allowall - non-standard, allow from any location

Correlates HTTP requests between a client and server.

The only defined value, "nosniff", prevents Internet Explorer from MIME-sniffing a response away from the declared content-type. This also applies to Google Chrome, when downloading extensions

Provide the duration of the audio or video in seconds; only supported by Gecko browsers

A general warning about possible problems with the entity body.

Indicates the authentication scheme that should be used to access the requested entity.

Informs the client of proxies through which the response was sent.

Tells downstream proxies how to match future request headers to decide whether the cached response can be used rather than requesting a fresh one from the origin server.

Tells a server which (presumably in the middle of a HTTP -> HTTPS migration) hosts mixed content that the client would prefer redirection to HTTPS and can handle Content-Security-Policy: upgrade-insecure-requests

Ask the client to upgrade to another protocol.

The form of encoding used to safely transfer the entity to the user. Currently defined methods are: chunked, compress, deflate, gzip, identity.

The Trailer general field value indicates that the given set of header fields is present in the trailer of a message encoded with chunked transfer coding.

Tracking Status Value, value suggested to be sent in response to a DNT(do-not-track)

A HSTS Policy informing the HTTP client how long to cache the HTTPS only policy and whether this applies to subdomains.

CGI header field specifying the status of the HTTP response. Normal HTTP responses use a separate "Status-Line" instead, defined by RFC 7230

An HTTP cookie

A name for the server

If an entity is temporarily unavailable, this instructs the client to try again later. Value could be a specified period of time (in seconds) or a HTTP-date.

Used in redirection, or when a new resource has been created. This refresh redirects after 5 seconds.

HTTP Public Key Pinning, announces hash of website's authentic TLS certificate

Request authentication to access the proxy.

Implementation-specific fields that may have various effects anywhere along the request-response chain.

This field is supposed to set P3P policy, in the form of P3P:CP="your_compact_policy".

Used in redirection, or when a new resource has been created.

Used to express a typed relationship with another resource, where the relation type is defined by RFC 5988

The last modified date for the requested object (in "HTTP-date" format as defined by RFC 7231)

Gives the date/time after which the response is considered stale (in "HTTP-date" format as defined by RFC 7231)

An identifier for a specific version of a resource, often a message digest

The date and time that the message was sent (in "HTTP-date" format as defined by RFC 7231)

The MIME type of this content

Content Security Policy definition.

Where in a full body message this partial message belongs

A Base64-encoded binary MD5 sum of the content of the response

An alternate location for the returned data

The length of the response body in octets (8-bit bytes)

The natural language or languages of the intended audience for the enclosed content

The type of encoding used on the data

An opportunity to raise a "File Download" dialogue box for a known MIME type with binary format or suggest a filename for dynamic content. Quotes are necessary with special characters.

Control options for the current connection and list of hop-by-hop response fields

Tells all caching mechanisms from server to client whether they may cache this object. It is measured in seconds

A server uses "Alt-Svc" header (meaning Alternative Services) to indicate that its resources can also be accessed at a different network location (host or port) or using a different protocol

Valid actions for a specified resource. To be used for a 405 Method not allowed

The age the object has been in a proxy cache in seconds

Specifying which web sites can participate in cross-origin resource sharing

What partial content range types this server supports via byte serving

Specifies which patch document formats this server supports

The Fetch API provides a JavaScript interface for accessing and manipulating parts of the HTTP pipeline, such as requests and responses. It also provides a global fetch() method that provides an easy, logical way to fetch resources asynchronously across the network.

This direction causes the cursor to be opened at the end of the source. When iterated, the cursor should not yield records with the same key, but otherwise yield all records, in monotonically decreasing order of keys. For every key with duplicate values, only the first record is yielded. When the source is an object store or a unique index, this direction has the exact same behavior as Prev.

This direction causes the cursor to be opened at the end of the source. When iterated, the cursor should yield all records, including duplicates, in monotonically decreasing order of keys.

This direction causes the cursor to be opened at the start of the source. When iterated, the cursor should not yield records with the same key, but otherwise yield all records, in monotonically increasing order of keys. For every key with duplicate values, only the first record is yielded. When the source is an object store or a unique index, this direction has the exact same behavior as Next.

This direction causes the cursor to be opened at the start of the source. When iterated, the cursor should yield all records, including duplicates, in monotonically increasing order of keys.

Update or insert method. It can be used in promise workflows. The return value is key set for the stored record. Note the continuation is called when the operation is added to the queue, but you still need to wait for the transaction to complete.

Delete all items in the store. It can be used in promise workflows. Note the continuation is called when the operation is added to the queue, but you still need to wait for the transaction to complete.

Delete the item specified by the key. It can be used in promise workflows. Note the continuation is called when the operation is added to the queue, but you still need to wait for the transaction to complete.

Insert only method. It can be used in promise workflows. The return value is key set for the stored record. Note the continuation is called when the operation is added to the queue, but you still need to wait for the transaction to complete.

If no range is passed, it will default to a key range that selects all the records in this object store. If no direction is passed, it will default to "next".

The parameter should not target the object primary key, but the property used by the index. The return value is the object actual primary key.

The parameter should not target the object primary key, but the property used by the index. The return value is the object actual primary key.

The parameter should not target the object primary key, but the property used by the index.

The parameter should not target the object primary key, but the property used by the index.

The parameter should not target the object primary key, but the property used by the index.

The parameter should not target the object primary key, but the property used by the index.