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{{>partial_header}}
package {{packageName}}
import (
"bytes"
"context"
"encoding/json"
"encoding/xml"
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"mime/multipart"
"net/http"
"net/http/httputil"
"net/url"
"os"
"path/filepath"
"reflect"
"regexp"
"strconv"
"strings"
"time"
"unicode/utf8"
"golang.org/x/oauth2"
{{#withAWSV4Signature}}
awsv4 "github.com/aws/aws-sdk-go/aws/signer/v4"
awscredentials "github.com/aws/aws-sdk-go/aws/credentials"
{{/withAWSV4Signature}}
)
var (
jsonCheck = regexp.MustCompile(`(?i:(?:application|text)/(?:vnd\.[^;]+\+)?json)`)
xmlCheck = regexp.MustCompile(`(?i:(?:application|text)/xml)`)
)
// APIClient manages communication with the {{appName}} API v{{version}}
// In most cases there should be only one, shared, APIClient.
type APIClient struct {
cfg *Configuration
common service // Reuse a single struct instead of allocating one for each service on the heap.
// API Services
{{#apiInfo}}
{{#apis}}
{{#operations}}
{{classname}} {{#generateInterfaces}}{{classname}}{{/generateInterfaces}}{{^generateInterfaces}}*{{classname}}Service{{/generateInterfaces}}
{{/operations}}
{{/apis}}
{{/apiInfo}}
}
type service struct {
client *APIClient
}
// NewAPIClient creates a new API client. Requires a userAgent string describing your application.
// optionally a custom http.Client to allow for advanced features such as caching.
func NewAPIClient(cfg *Configuration) *APIClient {
if cfg.HTTPClient == nil {
cfg.HTTPClient = http.DefaultClient
}
c := &APIClient{}
c.cfg = cfg
c.common.client = c
{{#apiInfo}}
// API Services
{{#apis}}
{{#operations}}
c.{{classname}} = (*{{classname}}Service)(&c.common)
{{/operations}}
{{/apis}}
{{/apiInfo}}
return c
}
func atoi(in string) (int, error) {
return strconv.Atoi(in)
}
// selectHeaderContentType select a content type from the available list.
func selectHeaderContentType(contentTypes []string) string {
if len(contentTypes) == 0 {
return ""
}
if contains(contentTypes, "application/json") {
return "application/json"
}
return contentTypes[0] // use the first content type specified in 'consumes'
}
// selectHeaderAccept join all accept types and return
func selectHeaderAccept(accepts []string) string {
if len(accepts) == 0 {
return ""
}
if contains(accepts, "application/json") {
return "application/json"
}
return strings.Join(accepts, ",")
}
// contains is a case insensitive match, finding needle in a haystack
func contains(haystack []string, needle string) bool {
for _, a := range haystack {
if strings.ToLower(a) == strings.ToLower(needle) {
return true
}
}
return false
}
// Verify optional parameters are of the correct type.
func typeCheckParameter(obj interface{}, expected string, name string) error {
// Make sure there is an object.
if obj == nil {
return nil
}
// Check the type is as expected.
if reflect.TypeOf(obj).String() != expected {
return fmt.Errorf("Expected %s to be of type %s but received %s.", name, expected, reflect.TypeOf(obj).String())
}
return nil
}
// parameterToString convert interface{} parameters to string, using a delimiter if format is provided.
func parameterToString(obj interface{}, collectionFormat string) string {
var delimiter string
switch collectionFormat {
case "pipes":
delimiter = "|"
case "ssv":
delimiter = " "
case "tsv":
delimiter = "\t"
case "csv":
delimiter = ","
}
if reflect.TypeOf(obj).Kind() == reflect.Slice {
return strings.Trim(strings.Replace(fmt.Sprint(obj), " ", delimiter, -1), "[]")
} else if t, ok := obj.(time.Time); ok {
return t.Format(time.RFC3339)
}
return fmt.Sprintf("%v", obj)
}
// helper for converting interface{} parameters to json strings
func parameterToJson(obj interface{}) (string, error) {
jsonBuf, err := json.Marshal(obj)
if err != nil {
return "", err
}
return string(jsonBuf), err
}
// callAPI do the request.
func (c *APIClient) callAPI(request *http.Request) (*http.Response, error) {
if c.cfg.Debug {
dump, err := httputil.DumpRequestOut(request, true)
if err != nil {
return nil, err
}
log.Printf("\n%s\n", string(dump))
}
resp, err := c.cfg.HTTPClient.Do(request)
if err != nil {
return resp, err
}
if c.cfg.Debug {
dump, err := httputil.DumpResponse(resp, true)
if err != nil {
return resp, err
}
log.Printf("\n%s\n", string(dump))
}
return resp, err
}
// Allow modification of underlying config for alternate implementations and testing
// Caution: modifying the configuration while live can cause data races and potentially unwanted behavior
func (c *APIClient) GetConfig() *Configuration {
return c.cfg
}
type formFile struct {
fileBytes []byte
fileName string
formFileName string
}
// prepareRequest build the request
func (c *APIClient) prepareRequest(
ctx context.Context,
path string, method string,
postBody interface{},
headerParams map[string]string,
queryParams url.Values,
formParams url.Values,
formFiles []formFile) (localVarRequest *http.Request, err error) {
var body *bytes.Buffer
// Detect postBody type and post.
if postBody != nil {
contentType := headerParams["Content-Type"]
if contentType == "" {
contentType = detectContentType(postBody)
headerParams["Content-Type"] = contentType
}
body, err = setBody(postBody, contentType)
if err != nil {
return nil, err
}
}
// add form parameters and file if available.
if strings.HasPrefix(headerParams["Content-Type"], "multipart/form-data") && len(formParams) > 0 || (len(formFiles) > 0) {
if body != nil {
return nil, errors.New("Cannot specify postBody and multipart form at the same time.")
}
body = &bytes.Buffer{}
w := multipart.NewWriter(body)
for k, v := range formParams {
for _, iv := range v {
if strings.HasPrefix(k, "@") { // file
err = addFile(w, k[1:], iv)
if err != nil {
return nil, err
}
} else { // form value
w.WriteField(k, iv)
}
}
}
for _, formFile := range formFiles {
if len(formFile.fileBytes) > 0 && formFile.fileName != "" {
w.Boundary()
part, err := w.CreateFormFile(formFile.formFileName, filepath.Base(formFile.fileName))
if err != nil {
return nil, err
}
_, err = part.Write(formFile.fileBytes)
if err != nil {
return nil, err
}
}
}
// Set the Boundary in the Content-Type
headerParams["Content-Type"] = w.FormDataContentType()
// Set Content-Length
headerParams["Content-Length"] = fmt.Sprintf("%d", body.Len())
w.Close()
}
if strings.HasPrefix(headerParams["Content-Type"], "application/x-www-form-urlencoded") && len(formParams) > 0 {
if body != nil {
return nil, errors.New("Cannot specify postBody and x-www-form-urlencoded form at the same time.")
}
body = &bytes.Buffer{}
body.WriteString(formParams.Encode())
// Set Content-Length
headerParams["Content-Length"] = fmt.Sprintf("%d", body.Len())
}
// Setup path and query parameters
url, err := url.Parse(path)
if err != nil {
return nil, err
}
// Override request host, if applicable
if c.cfg.Host != "" {
url.Host = c.cfg.Host
}
// Override request scheme, if applicable
if c.cfg.Scheme != "" {
url.Scheme = c.cfg.Scheme
}
// Adding Query Param
query := url.Query()
for k, v := range queryParams {
for _, iv := range v {
query.Add(k, iv)
}
}
// Encode the parameters.
url.RawQuery = query.Encode()
// Generate a new request
if body != nil {
localVarRequest, err = http.NewRequest(method, url.String(), body)
} else {
localVarRequest, err = http.NewRequest(method, url.String(), nil)
}
if err != nil {
return nil, err
}
// add header parameters, if any
if len(headerParams) > 0 {
headers := http.Header{}
for h, v := range headerParams {
headers[h] = []string{v}
}
localVarRequest.Header = headers
}
// Add the user agent to the request.
localVarRequest.Header.Add("User-Agent", c.cfg.UserAgent)
if ctx != nil {
// add context to the request
localVarRequest = localVarRequest.WithContext(ctx)
// Walk through any authentication.
// OAuth2 authentication
if tok, ok := ctx.Value(ContextOAuth2).(oauth2.TokenSource); ok {
// We were able to grab an oauth2 token from the context
var latestToken *oauth2.Token
if latestToken, err = tok.Token(); err != nil {
return nil, err
}
latestToken.SetAuthHeader(localVarRequest)
}
// Basic HTTP Authentication
if auth, ok := ctx.Value(ContextBasicAuth).(BasicAuth); ok {
localVarRequest.SetBasicAuth(auth.UserName, auth.Password)
}
// AccessToken Authentication
if auth, ok := ctx.Value(ContextAccessToken).(string); ok {
localVarRequest.Header.Add("Authorization", "Bearer "+auth)
}
{{#withAWSV4Signature}}
// AWS Signature v4 Authentication
if auth, ok := ctx.Value(ContextAWSv4).(AWSv4); ok {
creds := awscredentials.NewStaticCredentials(auth.AccessKey, auth.SecretKey, auth.SessionToken)
signer := awsv4.NewSigner(creds)
var reader *strings.Reader
if body == nil {
reader = strings.NewReader("")
} else {
reader = strings.NewReader(body.String())
}
// Define default values for region and service to maintain backward compatibility
region := auth.Region
if region == "" {
region = "eu-west-2"
}
service := auth.Service
if service == "" {
service = "oapi"
}
timestamp := time.Now()
_, err := signer.Sign(localVarRequest, reader, service, region, timestamp)
if err != nil {
return nil, err
}
}
{{/withAWSV4Signature}}
}
for header, value := range c.cfg.DefaultHeader {
localVarRequest.Header.Add(header, value)
}
{{#withCustomMiddlewareFunction}}
if c.cfg.Middleware != nil {
c.cfg.Middleware(localVarRequest)
}
{{/withCustomMiddlewareFunction}}
{{#hasHttpSignatureMethods}}
if ctx != nil {
// HTTP Signature Authentication. All request headers must be set (including default headers)
// because the headers may be included in the signature.
if auth, ok := ctx.Value(ContextHttpSignatureAuth).(HttpSignatureAuth); ok {
err = SignRequest(ctx, localVarRequest, auth)
if err != nil {
return nil, err
}
}
}
{{/hasHttpSignatureMethods}}
return localVarRequest, nil
}
func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err error) {
if len(b) == 0 {
return nil
}
if s, ok := v.(*string); ok {
*s = string(b)
return nil
}
if f, ok := v.(**os.File); ok {
*f, err = ioutil.TempFile("", "HttpClientFile")
if err != nil {
return
}
_, err = (*f).Write(b)
if err != nil {
return
}
_, err = (*f).Seek(0, io.SeekStart)
return
}
if xmlCheck.MatchString(contentType) {
if err = xml.Unmarshal(b, v); err != nil {
return err
}
return nil
}
if jsonCheck.MatchString(contentType) {
if actualObj, ok := v.(interface{ GetActualInstance() interface{} }); ok { // oneOf, anyOf schemas
if unmarshalObj, ok := actualObj.(interface{ UnmarshalJSON([]byte) error }); ok { // make sure it has UnmarshalJSON defined
if err = unmarshalObj.UnmarshalJSON(b); err != nil {
return err
}
} else {
return errors.New("Unknown type with GetActualInstance but no unmarshalObj.UnmarshalJSON defined")
}
} else if err = json.Unmarshal(b, v); err != nil { // simple model
return err
}
return nil
}
return errors.New("undefined response type")
}
// Add a file to the multipart request
func addFile(w *multipart.Writer, fieldName, path string) error {
file, err := os.Open(path)
if err != nil {
return err
}
defer file.Close()
part, err := w.CreateFormFile(fieldName, filepath.Base(path))
if err != nil {
return err
}
_, err = io.Copy(part, file)
return err
}
// Prevent trying to import "fmt"
func reportError(format string, a ...interface{}) error {
return fmt.Errorf(format, a...)
}
// Set request body from an interface{}
func setBody(body interface{}, contentType string) (bodyBuf *bytes.Buffer, err error) {
if bodyBuf == nil {
bodyBuf = &bytes.Buffer{}
}
if reader, ok := body.(io.Reader); ok {
_, err = bodyBuf.ReadFrom(reader)
} else if fp, ok := body.(**os.File); ok {
_, err = bodyBuf.ReadFrom(*fp)
} else if b, ok := body.([]byte); ok {
_, err = bodyBuf.Write(b)
} else if s, ok := body.(string); ok {
_, err = bodyBuf.WriteString(s)
} else if s, ok := body.(*string); ok {
_, err = bodyBuf.WriteString(*s)
} else if jsonCheck.MatchString(contentType) {
err = json.NewEncoder(bodyBuf).Encode(body)
} else if xmlCheck.MatchString(contentType) {
err = xml.NewEncoder(bodyBuf).Encode(body)
}
if err != nil {
return nil, err
}
if bodyBuf.Len() == 0 {
err = fmt.Errorf("Invalid body type %s\n", contentType)
return nil, err
}
return bodyBuf, nil
}
// detectContentType method is used to figure out `Request.Body` content type for request header
func detectContentType(body interface{}) string {
contentType := "text/plain; charset=utf-8"
kind := reflect.TypeOf(body).Kind()
switch kind {
case reflect.Struct, reflect.Map, reflect.Ptr:
contentType = "application/json; charset=utf-8"
case reflect.String:
contentType = "text/plain; charset=utf-8"
default:
if b, ok := body.([]byte); ok {
contentType = http.DetectContentType(b)
} else if kind == reflect.Slice {
contentType = "application/json; charset=utf-8"
}
}
return contentType
}
// Ripped from https://github.com/gregjones/httpcache/blob/master/httpcache.go
type cacheControl map[string]string
func parseCacheControl(headers http.Header) cacheControl {
cc := cacheControl{}
ccHeader := headers.Get("Cache-Control")
for _, part := range strings.Split(ccHeader, ",") {
part = strings.Trim(part, " ")
if part == "" {
continue
}
if strings.ContainsRune(part, '=') {
keyval := strings.Split(part, "=")
cc[strings.Trim(keyval[0], " ")] = strings.Trim(keyval[1], ",")
} else {
cc[part] = ""
}
}
return cc
}
// CacheExpires helper function to determine remaining time before repeating a request.
func CacheExpires(r *http.Response) time.Time {
// Figure out when the cache expires.
var expires time.Time
now, err := time.Parse(time.RFC1123, r.Header.Get("date"))
if err != nil {
return time.Now()
}
respCacheControl := parseCacheControl(r.Header)
if maxAge, ok := respCacheControl["max-age"]; ok {
lifetime, err := time.ParseDuration(maxAge + "s")
if err != nil {
expires = now
} else {
expires = now.Add(lifetime)
}
} else {
expiresHeader := r.Header.Get("Expires")
if expiresHeader != "" {
expires, err = time.Parse(time.RFC1123, expiresHeader)
if err != nil {
expires = now
}
}
}
return expires
}
func strlen(s string) int {
return utf8.RuneCountInString(s)
}
// GenericOpenAPIError Provides access to the body, error and model on returned errors.
type GenericOpenAPIError struct {
body []byte
error string
model interface{}
}
// Error returns non-empty string if there was an error.
func (e GenericOpenAPIError) Error() string {
return e.error
}
// Body returns the raw bytes of the response
func (e GenericOpenAPIError) Body() []byte {
return e.body
}
// Model returns the unpacked model of the error
func (e GenericOpenAPIError) Model() interface{} {
return e.model
}
