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handle6 methods

HttpMount

An opaque capability for HTTP to one operator-pinned origin. The operator configures the origin, its access control and any credential added to the requests; none of it is visible to the app. Handles come only from datumhue.args.http_mounts, and an app holding one can pass it on to a child through app.spawn's http_mounts. Each method takes a mount-relative path (resolved against the origin) and an options table, starts the request immediately, and returns its Response at once — await it with :ready() or datumhue.ready, or probe its state. A request never sets the host; its path stays under the mount, and redirects are followed only within it.

Obtained from
datumhue.args
Accepted by
datumhue.app.spawn

The examples on this page start from:

lua
local api = datumhue.args.http_mounts.weather

Methods 6

HttpMount:get

method
HttpMount:get(path: string, opts?: HttpMount.RequestOptions) -> Response

Send a GET request for path and return its Response. A GET carries no body.

Example
local res = api:get("/forecast", { query = { city = "Oslo" } }):ready()
if res.status == 200 then
    print(res.body:json().temperature)
end

opts HttpMount.RequestOptions options 4 keys

KeyTypeDefaultDescription
headerstable<string, string>only the headers the mount addsRequest headers. Host, a connection or framing header, a Proxy- or Sec- header, a forwarding or client-address header (Forwarded, Via, X-Forwarded-*, X-Real-IP and their kin), a method or path override, or one name given twice in different case raises at the call; the mount may replace Authorization.
querytable<string, string>the path is sent as givenQuery-string parameters appended to the path.
bodyBytesthe request carries no bodyRequest body as opaque Bytes; GET and HEAD raise with one.
timeout_msinteger0Request timeout in milliseconds; 0 uses the mount's default.

In the guide: Call a web API

HttpMount:post

method
HttpMount:post(path: string, opts?: HttpMount.RequestOptions) -> Response

Send a POST request to path, with the options' body if given, and return its Response.

Example
local res = api:post("/reports", {
    headers = { ["content-type"] = "application/json" },
    body = datumhue.bytes.json({ city = "Oslo", temperature = 4 }),
    timeout_ms = 5000,
}):ready()
print(res.status)

opts HttpMount.RequestOptions options 4 keys

KeyTypeDefaultDescription
headerstable<string, string>only the headers the mount addsRequest headers. Host, a connection or framing header, a Proxy- or Sec- header, a forwarding or client-address header (Forwarded, Via, X-Forwarded-*, X-Real-IP and their kin), a method or path override, or one name given twice in different case raises at the call; the mount may replace Authorization.
querytable<string, string>the path is sent as givenQuery-string parameters appended to the path.
bodyBytesthe request carries no bodyRequest body as opaque Bytes; GET and HEAD raise with one.
timeout_msinteger0Request timeout in milliseconds; 0 uses the mount's default.

In the guide: Call a web API

HttpMount:put

method
HttpMount:put(path: string, opts?: HttpMount.RequestOptions) -> Response

Send a PUT request to path, with the options' body if given, and return its Response.

opts HttpMount.RequestOptions options 4 keys

KeyTypeDefaultDescription
headerstable<string, string>only the headers the mount addsRequest headers. Host, a connection or framing header, a Proxy- or Sec- header, a forwarding or client-address header (Forwarded, Via, X-Forwarded-*, X-Real-IP and their kin), a method or path override, or one name given twice in different case raises at the call; the mount may replace Authorization.
querytable<string, string>the path is sent as givenQuery-string parameters appended to the path.
bodyBytesthe request carries no bodyRequest body as opaque Bytes; GET and HEAD raise with one.
timeout_msinteger0Request timeout in milliseconds; 0 uses the mount's default.

HttpMount:patch

method
HttpMount:patch(path: string, opts?: HttpMount.RequestOptions) -> Response

Send a PATCH request to path, with the options' body if given, and return its Response.

opts takes the same keys as HttpMount.RequestOptions.

HttpMount:delete

method
HttpMount:delete(path: string, opts?: HttpMount.RequestOptions) -> Response

Send a DELETE request for path, with the options' body if given, and return its Response.

opts takes the same keys as HttpMount.RequestOptions.

HttpMount:head

method
HttpMount:head(path: string, opts?: HttpMount.RequestOptions) -> Response

Send a HEAD request for path and return its Response, whose body is empty. A HEAD carries no body.

Example
local res = api:head("/forecast"):ready()
print(res.status, res.headers["content-length"])

opts takes the same keys as HttpMount.RequestOptions.

Types 1

HttpMount.RequestOptions

options

options 4 keys

KeyTypeDefaultDescription
headerstable<string, string>only the headers the mount addsRequest headers. Host, a connection or framing header, a Proxy- or Sec- header, a forwarding or client-address header (Forwarded, Via, X-Forwarded-*, X-Real-IP and their kin), a method or path override, or one name given twice in different case raises at the call; the mount may replace Authorization.
querytable<string, string>the path is sent as givenQuery-string parameters appended to the path.
bodyBytesthe request carries no bodyRequest body as opaque Bytes; GET and HEAD raise with one.
timeout_msinteger0Request timeout in milliseconds; 0 uses the mount's default.

Used by: HttpMount:get, HttpMount:post, HttpMount:put, HttpMount:patch, HttpMount:delete, HttpMount:head

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