httpclient

package
v0.0.78 Latest Latest
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 Go to latest Published: Feb 29, 2024 License: MIT Imports: 24 Imported by: 5

Documentation

Overview

httpclient_api_handler.go

http_client_bearer_token_auth.go 

The http_client_auth package focuses on authentication mechanisms for an HTTP client.

It provides structures and methods for handling both basic and bearer token based authentication

http_client_oauth.go 

The http_client_auth package focuses on authentication mechanisms for an HTTP client.

It provides structures and methods for handling OAuth-based authentication

http_client_auth_token_management.go

http_client.go 

The `http_client` package provides a configurable HTTP client tailored for interacting with specific APIs.

It supports different authentication methods, including "bearer" and "oauth". The client is designed with a focus on concurrency management, structured error handling, and flexible configuration options. The package offers a default timeout, custom backoff strategies, dynamic rate limiting, and detailed logging capabilities. The main `Client` structure encapsulates all necessary components, like the baseURL, authentication details, and an embedded standard HTTP client.

http_concurrency_management.go package httpclient provides utilities to manage HTTP client interactions, including concurrency control. The Concurrency Manager ensures no more than a certain number of concurrent requests (e.g., 5 for Jamf Pro) are sent at the same time. This is managed using a semaphore

http_helpers.go

httpclient_methods.go

httpclient_mocklogger.go

http_request.go

sdk_version.go

Index

Constants

View Source 
const (
	DefaultLogLevel                  = logger.LogLevelInfo
	DefaultMaxRetryAttempts          = 3
	DefaultEnableDynamicRateLimiting = true
	DefaultMaxConcurrentRequests     = 5
	DefaultTokenBufferPeriod         = 5 * time.Minute
	DefaultTotalRetryDuration        = 5 * time.Minute
	DefaultTimeout                   = 10 * time.Second
)
View Source 
const (
	MaxConcurrency     = 10              // Maximum allowed concurrent requests
	MinConcurrency     = 1               // Minimum allowed concurrent requests
	EvaluationInterval = 1 * time.Minute // Time interval for evaluating metrics and adjusting concurrency
)
View Source 
const (
	SDKVersion    = "0.0.8"
	UserAgentBase = "go-api-http-client"
)

Variables

This section is empty.

Functions

func CheckDeprecationHeader 

func CheckDeprecationHeader(resp *http.Response, log logger.Logger)

CheckDeprecationHeader checks the response headers for the Deprecation header and logs a warning if present.

func DetermineAuthMethod added in v0.0.9 

func DetermineAuthMethod(authConfig AuthConfig) (string, error)

DetermineAuthMethod determines the authentication method based on the provided credentials. It prefers strong authentication methods (e.g., OAuth) over weaker ones (e.g., bearer tokens). It logs an error and returns "unknown" if no valid credentials are provided.

func GetUserAgentHeader 

func GetUserAgentHeader() string

func HeadersToString 

func HeadersToString(headers http.Header) string

HeadersToString converts a http.Header to a string for logging, with each header on a new line for readability.

func IsIdempotentHTTPMethod added in v0.0.46 

func IsIdempotentHTTPMethod(method string) bool

IsIdempotentHTTPMethod checks if the given HTTP method is idempotent.

func IsNonIdempotentHTTPMethod added in v0.0.46 

func IsNonIdempotentHTTPMethod(method string) bool

IsNonIdempotentHTTPMethod checks if the given HTTP method is non-idempotent. PATCH can be idempotent but often isn't used as such.

func IsValidClientID added in v0.0.9 

func IsValidClientID(clientID string) (bool, string)

IsValidClientID checks if the provided client ID is a valid UUID. Returns true if valid, along with an empty error message; otherwise, returns false with an error message.

func IsValidClientSecret added in v0.0.9 

func IsValidClientSecret(clientSecret string) (bool, string)

IsValidClientSecret checks if the provided client secret meets your application's validation criteria. Returns true if valid, along with an empty error message; otherwise, returns false with an error message.

func IsValidPassword added in v0.0.9 

func IsValidPassword(password string) (bool, string)

IsValidPassword checks if the provided password meets your application's validation criteria. Returns true if valid, along with an empty error message; otherwise, returns false with an error message.

func IsValidUsername added in v0.0.9 

func IsValidUsername(username string) (bool, string)

IsValidUsername checks if the provided username meets your application's validation criteria. Returns true if valid, along with an empty error message; otherwise, returns false with an error message.

func Min 

func Min(a, b int) int

Min returns the smaller of the two integers.

func ParseISO8601Date 

func ParseISO8601Date(dateStr string) (time.Time, error)

ParseISO8601Date attempts to parse a string date in ISO 8601 format.

func RedactSensitiveData added in v0.0.13 

func RedactSensitiveData(client *Client, key string, value string) string

RedactSensitiveData redacts sensitive data if the HideSensitiveData flag is set to true.

func SetAcceptEncodingHeader added in v0.0.40 

func SetAcceptEncodingHeader(req *http.Request, acceptEncodingValue string)

SetAcceptEncodingHeader sets the Accept-Encoding header for an HTTP request. This header indicates the type of encoding (e.g., gzip) the client can handle.

func SetCacheControlHeader added in v0.0.40 

func SetCacheControlHeader(req *http.Request, cacheControlValue string)

SetCacheControlHeader sets the Cache-Control header for an HTTP request. This header specifies directives for caching mechanisms in requests and responses.

func SetConditionalHeaders added in v0.0.40 

func SetConditionalHeaders(req *http.Request, ifModifiedSince, ifNoneMatch string)

SetConditionalHeaders sets the If-Modified-Since and If-None-Match headers for an HTTP request. These headers make a request conditional to ask the server to return content only if it has changed.

func SetCustomHeader added in v0.0.40 

func SetCustomHeader(req *http.Request, headerName, headerValue string)

SetCustomHeader sets a custom header for an HTTP request. This function allows setting arbitrary headers for specialized API requirements.

func SetRefererHeader added in v0.0.40 

func SetRefererHeader(req *http.Request, refererValue string)

SetRefererHeader sets the Referer header for an HTTP request. This header indicates the address of the previous web page from which a link was followed.

func SetXForwardedForHeader added in v0.0.40 

func SetXForwardedForHeader(req *http.Request, xForwardedForValue string)

SetXForwardedForHeader sets the X-Forwarded-For header for an HTTP request. This header is used to identify the originating IP address of a client connecting through a proxy.

Types

type APIHandler 

type APIHandler interface {
	ConstructAPIResourceEndpoint(instanceName string, endpointPath string, log logger.Logger) string
	ConstructAPIAuthEndpoint(instanceName string, endpointPath string, log logger.Logger) string
	MarshalRequest(body interface{}, method string, endpoint string, log logger.Logger) ([]byte, error)
	MarshalMultipartRequest(fields map[string]string, files map[string]string, log logger.Logger) ([]byte, string, error)
	HandleAPISuccessResponse(resp *http.Response, out interface{}, log logger.Logger) error
	HandleAPIErrorResponse(resp *http.Response, out interface{}, log logger.Logger) error
	GetContentTypeHeader(method string, log logger.Logger) string
	GetAcceptHeader() string
	GetDefaultBaseDomain() string
	GetOAuthTokenEndpoint() string
	GetBearerTokenEndpoint() string
	GetTokenRefreshEndpoint() string
	GetTokenInvalidateEndpoint() string
	GetAPIBearerTokenAuthenticationSupportStatus() bool
	GetAPIOAuthAuthenticationSupportStatus() bool
	GetAPIOAuthWithCertAuthenticationSupportStatus() bool
	GetAPIRequestHeaders(endpoint string) map[string]string // Provides standard headers required for making API requests.
}

APIHandler is an interface for encoding, decoding, and implenting contexual api functions for different API implementations. It encapsulates behavior for encoding and decoding requests and responses.

func LoadAPIHandler 

func LoadAPIHandler(apiType string, log logger.Logger) (APIHandler, error)

LoadAPIHandler returns an APIHandler based on the provided API type. 'apiType' parameter could be "jamf" or "graph" to specify which API handler to load.

type AuthConfig 

type AuthConfig struct {
	Username     string `json:"Username,omitempty"`
	Password     string `json:"Password,omitempty"`
	ClientID     string `json:"ClientID,omitempty"`
	ClientSecret string `json:"ClientSecret,omitempty"`
}

AuthConfig represents the structure to read authentication details from a JSON configuration file.

type BearerTokenAuthCredentials 

type BearerTokenAuthCredentials struct {
	Username string
	Password string
}

BearerTokenAuthCredentials represents the username and password for basic authentication.

type Client 

type Client struct {
	APIHandler                 APIHandler                 // APIHandler interface used to define which API handler to use
	InstanceName               string                     // Website Instance name without the root domain
	AuthMethod                 string                     // Specifies the authentication method: "bearer" or "oauth"
	Token                      string                     // Authentication Token
	OverrideBaseDomain         string                     // Base domain override used when the default in the api handler isn't suitable
	OAuthCredentials           OAuthCredentials           // ClientID / Client Secret
	BearerTokenAuthCredentials BearerTokenAuthCredentials // Username and Password for Basic Authentication
	Expiry                     time.Time                  // Expiry time set for the auth token

	Logger         logger.Logger
	ConcurrencyMgr *ConcurrencyManager
	PerfMetrics    PerformanceMetrics
	// contains filtered or unexported fields
}

Client represents an HTTP client to interact with a specific API.

func BuildClient 

func BuildClient(config ClientConfig) (*Client, error)

BuildClient creates a new HTTP client with the provided configuration.

func (*Client) AcquireConcurrencyToken added in v0.0.48 

func (c *Client) AcquireConcurrencyToken(ctx context.Context) (context.Context, error)

AcquireConcurrencyToken attempts to acquire a token from the ConcurrencyManager to manage the number of concurrent requests. This function is designed to ensure that the HTTP client adheres to predefined concurrency limits, preventing an excessive number of simultaneous requests. It creates a new context with a timeout to avoid indefinite blocking in case the concurrency limit is reached. Upon successfully acquiring a token, it records the time taken to acquire the token and updates performance metrics accordingly. The function then adds the acquired request ID to the context, which can be used for tracking and managing individual requests.

Parameters: - ctx: The parent context from which the new context with timeout will be derived. This allows for proper request cancellation and timeout handling.

Returns: - A new context containing the acquired request ID, which should be passed to subsequent operations requiring concurrency control.

- An error if the token could not be acquired within the timeout period or due to any other issues encountered by the ConcurrencyManager.

Usage: This function should be called before making an HTTP request that needs to be controlled for concurrency. The returned context should be used for the HTTP request to ensure it is associated with the acquired concurrency token.

func (*Client) AdjustConcurrencyBasedOnMetrics 

func (c *Client) AdjustConcurrencyBasedOnMetrics()

AdjustConcurrencyBasedOnMetrics evaluates the current metrics and adjusts the concurrency limit if required. It checks metrics like average token acquisition time and decides on a new concurrency limit. The method ensures that the new limit respects the minimum and maximum allowed concurrency bounds.

func (*Client) AverageAcquisitionTime 

func (c *Client) AverageAcquisitionTime() time.Duration

Returns the average Acquisition Time to get a token from the semaphore

func (*Client) DoMultipartRequest 

func (c *Client) DoMultipartRequest(method, endpoint string, fields map[string]string, files map[string]string, out interface{}) (*http.Response, error)

DoMultipartRequest creates and executes a multipart HTTP request. It is used for sending files and form fields in a single request. This method handles the construction of the multipart message body, setting the appropriate headers, and sending the request to the given endpoint.

Parameters: - method: The HTTP method to use (e.g., POST, PUT). - endpoint: The API endpoint to which the request will be sent. - fields: A map of form fields and their values to include in the multipart message. - files: A map of file field names to file paths that will be included as file attachments. - out: A pointer to a variable where the unmarshaled response will be stored.

Returns: - A pointer to the http.Response received from the server. - An error if the request could not be sent or the response could not be processed.

The function first validates the authentication token, then constructs the multipart request body based on the provided fields and files. It then constructs the full URL for the request, sets the required headers (including Authorization and Content-Type), and sends the request.

If debug mode is enabled, the function logs all the request headers before sending the request. After the request is sent, the function checks the response status code. If the response is not within the success range (200-299), it logs an error and returns the response and an error. If the response is successful, it attempts to unmarshal the response body into the 'out' parameter.

Note: The caller should handle closing the response body when successful.

func (*Client) DoRequest 

func (c *Client) DoRequest(method, endpoint string, body, out interface{}) (*http.Response, error)

func (*Client) EvaluateMetricsAndAdjustConcurrency 

func (c *Client) EvaluateMetricsAndAdjustConcurrency()

EvaluateMetricsAndAdjustConcurrency evaluates the performance metrics and makes necessary adjustments to the concurrency limit. The method assesses the average response time and adjusts the concurrency based on how it compares to the historical average acquisition time. If the average response time has significantly increased compared to the historical average, the concurrency limit is decreased, and vice versa. The method ensures that the concurrency limit remains within the bounds defined by the system's best practices.

func (*Client) GetPerformanceMetrics 

func (c *Client) GetPerformanceMetrics() *PerformanceMetrics

Returns performance metrics from the http client

func (*Client) HistoricalAverageAcquisitionTime 

func (c *Client) HistoricalAverageAcquisitionTime() time.Duration

func (*Client) ObtainOAuthToken 

func (c *Client) ObtainOAuthToken(credentials AuthConfig) error

ObtainOAuthToken fetches an OAuth access token using the provided OAuthCredentials (Client ID and Client Secret). It updates the client's Token and Expiry fields with the obtained values.

func (*Client) ObtainToken 

func (c *Client) ObtainToken(log logger.Logger) error

ObtainToken fetches and sets an authentication token using the stored basic authentication credentials.

func (*Client) RefreshToken 

func (c *Client) RefreshToken(log logger.Logger) error

RefreshToken refreshes the current authentication token.

func (*Client) SetBearerTokenAuthCredentials 

func (c *Client) SetBearerTokenAuthCredentials(credentials BearerTokenAuthCredentials)

SetBearerTokenAuthCredentials sets the BearerTokenAuthCredentials (Username and Password) for the client instance. These credentials are used for obtaining and refreshing bearer tokens for authentication.

func (*Client) SetOAuthCredentials 

func (c *Client) SetOAuthCredentials(credentials OAuthCredentials)

SetOAuthCredentials sets the OAuth credentials (Client ID and Client Secret) for the client instance. These credentials are used for obtaining and refreshing OAuth tokens for authentication.

func (*Client) StartConcurrencyAdjustment 

func (c *Client) StartConcurrencyAdjustment()

StartConcurrencyAdjustment launches a periodic checker that evaluates current metrics and adjusts concurrency limits if needed. It uses a ticker to periodically trigger the adjustment logic.

func (*Client) StartMetricEvaluation 

func (c *Client) StartMetricEvaluation()

StartMetricEvaluation continuously monitors the client's interactions with the API and adjusts the concurrency limits dynamically. The function evaluates metrics at regular intervals to detect burst activity patterns. If a burst activity is detected (e.g., many requests in a short period), the evaluation interval is reduced for more frequent checks. Otherwise, it reverts to a default interval for regular checks. After each evaluation, the function calls EvaluateMetricsAndAdjustConcurrency to potentially adjust the concurrency based on observed metrics.

The evaluation process works as follows: 1. Sleep for the defined evaluation interval. 2. Check if there's a burst in activity using the isBurstActivity method. 3. If a burst is detected, the evaluation interval is shortened to more frequently monitor and adjust the concurrency. 4. If no burst is detected, it maintains the default evaluation interval. 5. It then evaluates the metrics and adjusts the concurrency accordingly.

func (*Client) ValidAuthTokenCheck 

func (c *Client) ValidAuthTokenCheck() (bool, error)

ValidAuthTokenCheck checks if the current token is valid and not close to expiry. If the token is invalid, it tries to refresh it. It returns a boolean indicating the validity of the token and an error if there's a failure.

type ClientConfig added in v0.0.12 

type ClientConfig struct {
	Auth          AuthConfig        // User can either supply these values manually or pass from LoadAuthConfig/Env vars
	Environment   EnvironmentConfig // User can either supply these values manually or pass from LoadAuthConfig/Env vars
	ClientOptions ClientOptions     // Optional configuration options for the HTTP Client
}

Config holds configuration options for the HTTP Client.

func LoadConfigFromEnv added in v0.0.75 

func LoadConfigFromEnv(config *ClientConfig) (*ClientConfig, error)

LoadConfigFromEnv populates the ClientConfig structure with values from environment variables. It updates the configuration for authentication, environment specifics, and client options based on the presence of environment variables. For each configuration option, if an environment variable is set, its value is used; otherwise, the existing value in the ClientConfig structure is retained. It also sets default values if necessary and validates the final configuration, returning an error if the configuration is incomplete.

func LoadConfigFromFile added in v0.0.77 

func LoadConfigFromFile(filePath string) (*ClientConfig, error)

LoadConfigFromFile loads configuration values from a JSON file into the ClientConfig struct. This function opens the specified configuration file, reads its content, and unmarshals the JSON data into the ClientConfig struct. It's designed to initialize the client configuration with values from a file, complementing or overriding defaults and environment variable settings. LoadConfigFromFile loads configuration values from a JSON file into the ClientConfig struct.

type ClientOptions added in v0.0.12 

type ClientOptions struct {
	LogLevel                  string // Field for defining tiered logging level.
	LogOutputFormat           string // Field for defining the output format of the logs. Use "JSON" for JSON format, "console" for human-readable format
	LogConsoleSeparator       string // Field for defining the separator in console output format.
	HideSensitiveData         bool   // Field for defining whether sensitive fields should be hidden in logs.
	MaxRetryAttempts          int    // Config item defines the max number of retry request attempts for retryable HTTP methods.
	EnableDynamicRateLimiting bool   // Field for defining whether dynamic rate limiting should be enabled.
	MaxConcurrentRequests     int    // Field for defining the maximum number of concurrent requests allowed in the semaphore
	TokenRefreshBufferPeriod  time.Duration
	TotalRetryDuration        time.Duration
	CustomTimeout             time.Duration
}

ClientOptions holds optional configuration options for the HTTP Client.

type ConcurrencyManager 

type ConcurrencyManager struct {
	AcquisitionTimes []time.Duration
	// contains filtered or unexported fields
}

ConcurrencyManager controls the number of concurrent HTTP requests.

func NewConcurrencyManager 

func NewConcurrencyManager(limit int, logger logger.Logger, debugMode bool) *ConcurrencyManager

NewConcurrencyManager initializes a new ConcurrencyManager with the given concurrency limit, logger, and debug mode. The ConcurrencyManager ensures no more than a certain number of concurrent requests are made. It uses a semaphore to control concurrency.

func (*ConcurrencyManager) Acquire 

func (c *ConcurrencyManager) Acquire(ctx context.Context) (uuid.UUID, error)

Acquire attempts to get a token to allow an HTTP request to proceed. It blocks until a token is available or the context expires. Returns a unique request ID upon successful acquisition.

func (*ConcurrencyManager) AdjustConcurrencyLimit 

func (c *ConcurrencyManager) AdjustConcurrencyLimit(newLimit int)

AdjustConcurrencyLimit dynamically modifies the maximum concurrency limit based on the newLimit provided. This function helps in adjusting the concurrency limit in real-time based on observed system performance and other metrics. It transfers the tokens from the old semaphore to the new one, ensuring that there's no loss of tokens during the transition.

func (*ConcurrencyManager) AverageAcquisitionTime 

func (c *ConcurrencyManager) AverageAcquisitionTime() time.Duration

AverageAcquisitionTime computes the average time taken to acquire a token from the semaphore. It helps in understanding the contention for tokens and can be used to adjust concurrency limits.

func (*ConcurrencyManager) HistoricalAverageAcquisitionTime 

func (c *ConcurrencyManager) HistoricalAverageAcquisitionTime() time.Duration

HistoricalAverageAcquisitionTime computes the average time taken to acquire a token from the semaphore over a historical period (e.g., the last 5 minutes). It helps in understanding the historical contention for tokens and can be used to adjust concurrency limits.

func (*ConcurrencyManager) Release 

func (c *ConcurrencyManager) Release(requestID uuid.UUID)

Release returns a token back to the pool, allowing other requests to proceed. It uses the provided requestID for logging and debugging purposes.

type EnvironmentConfig added in v0.0.5 

type EnvironmentConfig struct {
	InstanceName       string `json:"InstanceName,omitempty"`
	OverrideBaseDomain string `json:"OverrideBaseDomain,omitempty"`
	APIType            string `json:"APIType,omitempty"`
}

EnvironmentConfig represents the structure to read authentication details from a JSON configuration file.

type HeaderManager added in v0.0.40 

type HeaderManager struct {
	// contains filtered or unexported fields
}

HeaderManager is responsible for managing and setting headers on HTTP requests.

func NewHeaderManager added in v0.0.40 

func NewHeaderManager(req *http.Request, log logger.Logger, apiHandler APIHandler, token string) *HeaderManager

NewHeaderManager creates a new instance of HeaderManager for a given http.Request, logger, and APIHandler.

func (*HeaderManager) LogHeaders added in v0.0.40 

func (h *HeaderManager) LogHeaders(client *Client)

LogHeaders prints all the current headers in the http.Request using the zap logger. It uses the RedactSensitiveData function to redact sensitive data if required.

func (*HeaderManager) SetAccept added in v0.0.40 

func (h *HeaderManager) SetAccept(acceptHeader string)

SetAccept sets the Accept header for the request.

func (*HeaderManager) SetAuthorization added in v0.0.40 

func (h *HeaderManager) SetAuthorization(token string)

SetAuthorization sets the Authorization header for the request.

func (*HeaderManager) SetContentType added in v0.0.40 

func (h *HeaderManager) SetContentType(contentType string)

SetContentType sets the Content-Type header for the request.

func (*HeaderManager) SetRequestHeaders added in v0.0.40 

func (h *HeaderManager) SetRequestHeaders(endpoint string)

SetRequestHeaders sets the necessary HTTP headers for a given request using the APIHandler to determine the required headers.

func (*HeaderManager) SetUserAgent added in v0.0.40 

func (h *HeaderManager) SetUserAgent(userAgent string)

SetUserAgent sets the User-Agent header for the request.

type MockLogger added in v0.0.65 

type MockLogger struct {
	mock.Mock
	*zap.Logger
}

MockLogger is a mock type for the logger.Logger interface used in the httpclient package.

func NewMockLogger added in v0.0.65 

func NewMockLogger() *MockLogger

NewMockLogger creates a new instance of MockLogger with an embedded no-op *zap.Logger.

func (*MockLogger) Debug added in v0.0.65 

func (m *MockLogger) Debug(msg string, fields ...zap.Field)

func (*MockLogger) Error added in v0.0.65 

func (m *MockLogger) Error(msg string, fields ...zap.Field) error

Error method

func (*MockLogger) Fatal added in v0.0.65 

func (m *MockLogger) Fatal(msg string, fields ...zap.Field)

func (*MockLogger) GetLogLevel added in v0.0.65 

func (m *MockLogger) GetLogLevel() logger.LogLevel

func (*MockLogger) Info added in v0.0.65 

func (m *MockLogger) Info(msg string, fields ...zap.Field)

func (*MockLogger) Panic added in v0.0.65 

func (m *MockLogger) Panic(msg string, fields ...zap.Field)

func (*MockLogger) SetLevel added in v0.0.65 

func (m *MockLogger) SetLevel(level logger.LogLevel)

Define all methods from the logger.Logger interface with mock implementations.

func (*MockLogger) Warn added in v0.0.65 

func (m *MockLogger) Warn(msg string, fields ...zap.Field)

func (*MockLogger) With added in v0.0.65 

func (m *MockLogger) With(fields ...zap.Field) logger.Logger

type OAuthCredentials 

type OAuthCredentials struct {
	ClientID     string
	ClientSecret string
}

OAuthCredentials contains the client ID and client secret required for OAuth authentication.

type OAuthResponse 

type OAuthResponse struct {
	AccessToken  string `json:"access_token"`
	ExpiresIn    int64  `json:"expires_in"`
	TokenType    string `json:"token_type"`
	RefreshToken string `json:"refresh_token,omitempty"`
	Error        string `json:"error,omitempty"`
}

OAuthResponse represents the response structure when obtaining an OAuth access token.

type PerformanceMetrics 

type PerformanceMetrics struct {
	TotalRequests        int64
	TotalRetries         int64
	TotalRateLimitErrors int64
	TotalResponseTime    time.Duration
	TokenWaitTime        time.Duration
	// contains filtered or unexported fields
}

ClientPerformanceMetrics captures various metrics related to the client's interactions with the API, providing insights into its performance and behavior.

type TokenResponse 

type TokenResponse struct {
	Token   string    `json:"token"`
	Expires time.Time `json:"expires"`
}

TokenResponse represents the structure of a token response from the API.

Source Files

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