Class: HttpProxy
@ima/core.HttpProxy
Middleware proxy between HttpAgent implementations and the Fetch API, providing a Promise-oriented API for sending requests.
Constructors
constructor
• new HttpProxy(transformer, window)
Initializes the HTTP proxy.
Parameters
| Name | Type | Description |
|---|---|---|
transformer | UrlTransformer | A transformer of URLs to which requests are made. |
window | Window | Helper for manipulating the global object window regardless of the client/server-side environment. |
Defined in
packages/core/src/http/HttpProxy.ts:72
Properties
_defaultHeaders
• Protected _defaultHeaders: Map<string, string>
Defined in
packages/core/src/http/HttpProxy.ts:62
_transformer
• Protected _transformer: UrlTransformer
Defined in
packages/core/src/http/HttpProxy.ts:60
_window
• Protected _window: Window
Defined in
packages/core/src/http/HttpProxy.ts:61
Methods
_composeRequestInit
▸ _composeRequestInit(method, data, options): RequestInit
Composes an init object, which can be used as a second argument of
window.fetch method.
Parameters
| Name | Type | Description |
|---|---|---|
method | string | The HTTP method to use. |
data | UnknownParameters | The data to be send with a request. |
options | HttpAgentRequestOptions | Options provided by the HTTP agent. |
Returns
RequestInit
A RequestInit object of the Fetch API.
Defined in
packages/core/src/http/HttpProxy.ts:428
_composeRequestParams
▸ _composeRequestParams(method, url, data, options): HttpProxyRequestParams
Composes an object representing the HTTP request parameters from the provided arguments.
Parameters
| Name | Type | Description |
|---|---|---|
method | string | The HTTP method to use. |
url | string | The URL to which the request should be sent. |
data | UnknownParameters | The data to send with the request. |
options | HttpAgentRequestOptions | Optional request options. |
Returns
HttpProxyRequestParams
An object representing the complete request parameters used to create and send the HTTP request.
Defined in
packages/core/src/http/HttpProxy.ts:402
_composeRequestUrl
▸ _composeRequestUrl(url, data): string
Transforms the provided URL using the current URL transformer and adds the provided data to the URL's query string.
Parameters
| Name | Type | Description |
|---|---|---|
url | string | The URL to prepare for use with the fetch API. |
data | UnknownParameters | The data to be attached to the query string. |
Returns
string
The transformed URL with the provided data attached to its query string.
Defined in
packages/core/src/http/HttpProxy.ts:506
_convertObjectToFormData
▸ Private _convertObjectToFormData(object): UnknownParameters | FormData
Converts given data to FormData object. If FormData object is not supported by the browser the original object is returned.
Parameters
| Name | Type | Description |
|---|---|---|
object | UnknownParameters | The object to be converted |
Returns
UnknownParameters | FormData
Defined in
packages/core/src/http/HttpProxy.ts:585
_convertObjectToQueryString
▸ Private _convertObjectToQueryString(object): string
Returns query string representation of the data parameter. (Returned string does not contain ? at the beginning)
Parameters
| Name | Type | Description |
|---|---|---|
object | UnknownParameters | The object to be converted |
Returns
string
Query string representation of the given object
Defined in
packages/core/src/http/HttpProxy.ts:565
_createError
▸ _createError(cause, requestParams, status, responseBody?): GenericError
Creates an error that represents a failed HTTP request.
Parameters
| Name | Type | Default value | Description |
|---|---|---|---|
cause | Error | GenericError | undefined | The error's message. |
requestParams | HttpProxyRequestParams | undefined | An object representing the complete request parameters used to create and send the HTTP request. |
status | number | undefined | Server's response HTTP status code. |
responseBody | unknown | null | The body of the server's response, if any. |
Returns
The error representing a failed HTTP request.
Defined in
packages/core/src/http/HttpProxy.ts:370
_getContentType
▸ _getContentType(method, data, options): null | string
Gets a Content-Type header value for defined method, data and options.
Parameters
| Name | Type | Description |
|---|---|---|
method | string | The HTTP method to use. |
data | UnknownParameters | The data to be send with a request. |
options | HttpAgentRequestOptions | Options provided by the HTTP agent. |
Returns
null | string
A Content-Type header value, null for requests
with no body.
Defined in
packages/core/src/http/HttpProxy.ts:478
_headersToPlainObject
▸ _headersToPlainObject(headers): StringParameters
Converts the provided Fetch API's Headers object to a plain object.
Parameters
| Name | Type | Description |
|---|---|---|
headers | Headers | The headers to convert. |
Returns
Converted headers.
Defined in
packages/core/src/http/HttpProxy.ts:322
_processError
▸ _processError(fetchError, requestParams): GenericError
Processes the provided Fetch API or internal error and creates an error to expose to the calling API.
Parameters
| Name | Type | Description |
|---|---|---|
fetchError | Error | GenericError | The internal error to process. |
requestParams | HttpProxyRequestParams | An object representing the complete request parameters used to create and send the HTTP request. |
Returns
The error to provide to the calling API.
Defined in
packages/core/src/http/HttpProxy.ts:344
_processResponse
▸ _processResponse(requestParams, response, responseBody): HttpAgentResponse
Processes the response received from the server.
Parameters
| Name | Type | Description |
|---|---|---|
requestParams | HttpProxyRequestParams | The original request's parameters. |
response | Response | The Fetch API's Response object representing the server's response. |
responseBody | unknown | The server's response body. |
Returns
HttpAgentResponse
The server's response along with all related metadata.
Defined in
packages/core/src/http/HttpProxy.ts:294
_shouldRequestHaveBody
▸ _shouldRequestHaveBody(method, data?): boolean
Checks if a request should have a body (GET and HEAD requests don't
have a body).
Parameters
| Name | Type | Description |
|---|---|---|
method | string | The HTTP method. |
data? | UnknownParameters | The data to be send with a request. |
Returns
boolean
true if a request has a body, otherwise false.
Defined in
packages/core/src/http/HttpProxy.ts:527
_transformRequestBody
▸ Private _transformRequestBody(data, headers): string | UnknownParameters | FormData
Formats request body according to request headers.
Parameters
| Name | Type | Description |
|---|---|---|
data | UnknownParameters | The data to be send with a request. |
headers | StringParameters | Headers object from options provided by the HTTP agent. |
Returns
string | UnknownParameters | FormData
Defined in
packages/core/src/http/HttpProxy.ts:544
clearDefaultHeaders
▸ clearDefaultHeaders(): void
Clears all defaults headers sent with all requests.
Returns
void
Defined in
packages/core/src/http/HttpProxy.ts:198
getErrorParams
▸ getErrorParams(method, url, data, options, status, body, cause): HttpProxyErrorParams
Gets an object that describes a failed HTTP request, providing information about both the failure reported by the server and how the request has been sent to the server.
Parameters
| Name | Type | Description |
|---|---|---|
method | string | The HTTP method used to make the request. |
url | string | The URL to which the request has been made. |
data | UnknownParameters | The data sent with the request. |
options | HttpAgentRequestOptions | Optional request options. |
status | number | The HTTP response status code send by the server. |
body | unknown | The body of HTTP error response (detailed information). |
cause | Error | The low-level cause error. |
Returns
HttpProxyErrorParams
An object containing both the details of the error and the request that lead to it.
Defined in
packages/core/src/http/HttpProxy.ts:219
haveToSetCookiesManually
▸ haveToSetCookiesManually(): boolean
Returns true if cookies have to be processed manually by setting
Cookie HTTP header on requests and parsing the Set-Cookie HTTP
response header.
The result of this method depends on the current application
environment, the client-side usually handles cookie processing
automatically, leading this method returning false.
At the client-side, the method tests whether the client has cookies
enabled (which results in cookies being automatically processed by the
browser), and returns true or false accordingly.
true if cookies are not processed automatically by
the environment and have to be handled manually by parsing
response headers and setting request headers, otherwise false.
Returns
boolean
Defined in
packages/core/src/http/HttpProxy.ts:279
request
▸ request(method, url, data, options): Promise<unknown>
Executes a HTTP request to the specified URL using the specified HTTP method, carrying the provided data.
Parameters
| Name | Type | Description |
|---|---|---|
method | string | The HTTP method to use. |
url | string | The URL to which the request should be made. |
data | UnknownParameters | The data to be send to the server. The data will be included as query parameters if the request method is GET or HEAD, and as a request body for any other request method. |
options | HttpAgentRequestOptions | Optional request options. |
Returns
Promise<unknown>
A promise that resolves to the server response.
Defined in
packages/core/src/http/HttpProxy.ts:105
setDefaultHeader
▸ setDefaultHeader(header, value): void
Sets the specified default HTTP header. The header will be sent with all subsequent HTTP requests unless reconfigured using this method, overridden by request options, or cleared by clearDefaultHeaders method.
Parameters
| Name | Type | Description |
|---|---|---|
header | string | A header name. |
value | string | A header value. |
Returns
void