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connection.go
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connection.go
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package arangodb
import (
"github.com/apex/log"
"github.com/apex/log/handlers/text"
"net/http"
"os"
"sync"
"time"
)
const defaultTimeOut = time.Second * 10
func init() {
// Set up APEX log handler
log.SetHandler(text.New(os.Stderr))
}
// Config for the database session.
type Config struct {
Timeout time.Duration
KeepAlivePeriod time.Duration
// By default use JWT to authenticate.
// TODO create basic auth function
UseHttpBasicAuth bool
// Log all http requests to db.
DebugMode bool
// Automatically create edge/collection on insert if non existing
AutoCreateColOnInsert bool
TLS bool
}
type Connection struct {
client *http.Client
header http.Header
mu sync.Mutex
// Connection options
config *Config
// Host address
host string
// Database
db string
// Authentication token
token string
// Collection cache
colCache map[string]map[string]bool
}
func NewConnection(host, username, password string, config *Config) (*Connection, error) {
var err error
c := new(Connection)
c.config = config
c.host = buildHostAddress(host, config.TLS)
c.header = http.Header{}
c.colCache = make(map[string]map[string]bool)
// Set default headers
c.header.Set("Content-Type", "application/json")
// Set custom timeout.
// See https://goo.gl/NLk64L
timeOut := defaultTimeOut
if c.config.Timeout > 0 {
timeOut = c.config.Timeout
}
// Connect to server
c.client = &http.Client{
Timeout: timeOut,
}
// Authenticate to the database
err = c.authenticate(username, password)
if err != nil {
return nil, err
}
return c, nil
}