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resource_circonus_check_http.go
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resource_circonus_check_http.go
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package circonus
import (
"bytes"
"fmt"
"log"
"net/url"
"sort"
"strconv"
"strings"
"github.com/circonus-labs/circonus-gometrics/api/config"
"github.com/hashicorp/errwrap"
"github.com/hashicorp/terraform/helper/hashcode"
"github.com/hashicorp/terraform/helper/schema"
)
const (
// circonus_check.http.* resource attribute names
checkHTTPAuthMethodAttr = "auth_method"
checkHTTPAuthPasswordAttr = "auth_password"
checkHTTPAuthUserAttr = "auth_user"
checkHTTPBodyRegexpAttr = "body_regexp"
checkHTTPCAChainAttr = "ca_chain"
checkHTTPCertFileAttr = "certificate_file"
checkHTTPCiphersAttr = "ciphers"
checkHTTPCodeRegexpAttr = "code"
checkHTTPExtractAttr = "extract"
checkHTTPHeadersAttr = "headers"
checkHTTPKeyFileAttr = "key_file"
checkHTTPMethodAttr = "method"
checkHTTPPayloadAttr = "payload"
checkHTTPReadLimitAttr = "read_limit"
checkHTTPURLAttr = "url"
checkHTTPVersionAttr = "version"
)
var checkHTTPDescriptions = attrDescrs{
checkHTTPAuthMethodAttr: "The HTTP Authentication method",
checkHTTPAuthPasswordAttr: "The HTTP Authentication user password",
checkHTTPAuthUserAttr: "The HTTP Authentication user name",
checkHTTPBodyRegexpAttr: `This regular expression is matched against the body of the response. If a match is not found, the check will be marked as "bad.`,
checkHTTPCAChainAttr: "A path to a file containing all the certificate authorities that should be loaded to validate the remote certificate (for TLS checks)",
checkHTTPCodeRegexpAttr: `The HTTP code that is expected. If the code received does not match this regular expression, the check is marked as "bad."`,
checkHTTPCiphersAttr: "A list of ciphers to be used in the TLS protocol (for HTTPS checks)",
checkHTTPCertFileAttr: "A path to a file containing the client certificate that will be presented to the remote server (for TLS-enabled checks)",
checkHTTPExtractAttr: "This regular expression is matched against the body of the response globally. The first capturing match is the key and the second capturing match is the value. Each key/value extracted is registered as a metric for the check.",
checkHTTPHeadersAttr: "Map of HTTP Headers to send along with HTTP Requests",
checkHTTPKeyFileAttr: "A path to a file containing key to be used in conjunction with the cilent certificate (for TLS checks)",
checkHTTPMethodAttr: "The HTTP method to use",
checkHTTPPayloadAttr: "The information transferred as the payload of an HTTP request",
checkHTTPReadLimitAttr: "Sets an approximate limit on the data read (0 means no limit)",
checkHTTPURLAttr: "The URL to use as the target of the check",
checkHTTPVersionAttr: "Sets the HTTP version for the check to use",
}
var schemaCheckHTTP = &schema.Schema{
Type: schema.TypeSet,
Optional: true,
MaxItems: 1,
MinItems: 1,
Set: hashCheckHTTP,
Elem: &schema.Resource{
Schema: convertToHelperSchema(checkHTTPDescriptions, map[schemaAttr]*schema.Schema{
checkHTTPAuthMethodAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
ValidateFunc: validateRegexp(checkHTTPAuthMethodAttr, `^(?:Basic|Digest|Auto)$`),
},
checkHTTPAuthPasswordAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
Sensitive: true,
ValidateFunc: validateRegexp(checkHTTPAuthPasswordAttr, `^.*`),
},
checkHTTPAuthUserAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
ValidateFunc: validateRegexp(checkHTTPAuthUserAttr, `[^:]+`),
},
checkHTTPBodyRegexpAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
ValidateFunc: validateRegexp(checkHTTPBodyRegexpAttr, `.+`),
},
checkHTTPCAChainAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
ValidateFunc: validateRegexp(checkHTTPCAChainAttr, `.+`),
},
checkHTTPCertFileAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
ValidateFunc: validateRegexp(checkHTTPCertFileAttr, `.+`),
},
checkHTTPCiphersAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
ValidateFunc: validateRegexp(checkHTTPCiphersAttr, `.+`),
},
checkHTTPCodeRegexpAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: defaultCheckHTTPCodeRegexp,
ValidateFunc: validateRegexp(checkHTTPCodeRegexpAttr, `.+`),
},
checkHTTPExtractAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
ValidateFunc: validateRegexp(checkHTTPExtractAttr, `.+`),
},
checkHTTPHeadersAttr: &schema.Schema{
Type: schema.TypeMap,
Elem: schema.TypeString,
Optional: true,
ValidateFunc: validateHTTPHeaders,
},
checkHTTPKeyFileAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
ValidateFunc: validateRegexp(checkHTTPKeyFileAttr, `.+`),
},
checkHTTPMethodAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: defaultCheckHTTPMethod,
ValidateFunc: validateRegexp(checkHTTPMethodAttr, `\S+`),
},
checkHTTPPayloadAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
ValidateFunc: validateRegexp(checkHTTPPayloadAttr, `\S+`),
},
checkHTTPReadLimitAttr: &schema.Schema{
Type: schema.TypeInt,
Optional: true,
ValidateFunc: validateFuncs(
validateIntMin(checkHTTPReadLimitAttr, 0),
),
},
checkHTTPURLAttr: &schema.Schema{
Type: schema.TypeString,
Required: true,
ValidateFunc: validateFuncs(
validateHTTPURL(checkHTTPURLAttr, urlIsAbs),
),
},
checkHTTPVersionAttr: &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: defaultCheckHTTPVersion,
ValidateFunc: validateStringIn(checkHTTPVersionAttr, supportedHTTPVersions),
},
}),
},
}
// checkAPIToStateHTTP reads the Config data out of circonusCheck.CheckBundle into the
// statefile.
func checkAPIToStateHTTP(c *circonusCheck, d *schema.ResourceData) error {
httpConfig := make(map[string]interface{}, len(c.Config))
// swamp is a sanity check: it must be empty by the time this method returns
swamp := make(map[config.Key]string, len(c.Config))
for k, v := range c.Config {
swamp[k] = v
}
saveStringConfigToState := func(apiKey config.Key, attrName schemaAttr) {
if v, ok := c.Config[apiKey]; ok {
httpConfig[string(attrName)] = v
}
delete(swamp, apiKey)
}
saveIntConfigToState := func(apiKey config.Key, attrName schemaAttr) {
if v, ok := c.Config[apiKey]; ok {
i, err := strconv.ParseInt(v, 10, 64)
if err != nil {
log.Printf("[ERROR]: Unable to convert %s to an integer: %v", apiKey, err)
return
}
httpConfig[string(attrName)] = int(i)
}
delete(swamp, apiKey)
}
saveStringConfigToState(config.AuthMethod, checkHTTPAuthMethodAttr)
saveStringConfigToState(config.AuthPassword, checkHTTPAuthPasswordAttr)
saveStringConfigToState(config.AuthUser, checkHTTPAuthUserAttr)
saveStringConfigToState(config.Body, checkHTTPBodyRegexpAttr)
saveStringConfigToState(config.CAChain, checkHTTPCAChainAttr)
saveStringConfigToState(config.CertFile, checkHTTPCertFileAttr)
saveStringConfigToState(config.Ciphers, checkHTTPCiphersAttr)
saveStringConfigToState(config.Code, checkHTTPCodeRegexpAttr)
saveStringConfigToState(config.Extract, checkHTTPExtractAttr)
headers := make(map[string]interface{}, len(c.Config))
headerPrefixLen := len(config.HeaderPrefix)
for k, v := range c.Config {
if len(k) <= headerPrefixLen {
continue
}
if strings.Compare(string(k[:headerPrefixLen]), string(config.HeaderPrefix)) == 0 {
key := k[headerPrefixLen:]
headers[string(key)] = v
}
delete(swamp, k)
}
httpConfig[string(checkHTTPHeadersAttr)] = headers
saveStringConfigToState(config.KeyFile, checkHTTPKeyFileAttr)
saveStringConfigToState(config.Method, checkHTTPMethodAttr)
saveStringConfigToState(config.Payload, checkHTTPPayloadAttr)
saveIntConfigToState(config.ReadLimit, checkHTTPReadLimitAttr)
saveStringConfigToState(config.URL, checkHTTPURLAttr)
saveStringConfigToState(config.HTTPVersion, checkHTTPVersionAttr)
whitelistedConfigKeys := map[config.Key]struct{}{
config.ReverseSecretKey: struct{}{},
config.SubmissionURL: struct{}{},
}
for k := range swamp {
if _, ok := whitelistedConfigKeys[k]; ok {
delete(c.Config, k)
}
if _, ok := whitelistedConfigKeys[k]; !ok {
return fmt.Errorf("PROVIDER BUG: API Config not empty: %#v", swamp)
}
}
if err := d.Set(checkHTTPAttr, schema.NewSet(hashCheckHTTP, []interface{}{httpConfig})); err != nil {
return errwrap.Wrapf(fmt.Sprintf("Unable to store check %q attribute: {{err}}", checkHTTPAttr), err)
}
return nil
}
// hashCheckHTTP creates a stable hash of the normalized values
func hashCheckHTTP(v interface{}) int {
m := v.(map[string]interface{})
b := &bytes.Buffer{}
b.Grow(defaultHashBufSize)
writeInt := func(attrName schemaAttr) {
if v, ok := m[string(attrName)]; ok {
fmt.Fprintf(b, "%x", v.(int))
}
}
writeString := func(attrName schemaAttr) {
if v, ok := m[string(attrName)]; ok && v.(string) != "" {
fmt.Fprint(b, strings.TrimSpace(v.(string)))
}
}
// Order writes to the buffer using lexically sorted list for easy visual
// reconciliation with other lists.
writeString(checkHTTPAuthMethodAttr)
writeString(checkHTTPAuthPasswordAttr)
writeString(checkHTTPAuthUserAttr)
writeString(checkHTTPBodyRegexpAttr)
writeString(checkHTTPCAChainAttr)
writeString(checkHTTPCertFileAttr)
writeString(checkHTTPCiphersAttr)
writeString(checkHTTPCodeRegexpAttr)
writeString(checkHTTPExtractAttr)
if headersRaw, ok := m[string(checkHTTPHeadersAttr)]; ok {
headerMap := headersRaw.(map[string]interface{})
headers := make([]string, 0, len(headerMap))
for k := range headerMap {
headers = append(headers, k)
}
sort.Strings(headers)
for i := range headers {
fmt.Fprint(b, headers[i])
fmt.Fprint(b, headerMap[headers[i]].(string))
}
}
writeString(checkHTTPKeyFileAttr)
writeString(checkHTTPMethodAttr)
writeString(checkHTTPPayloadAttr)
writeInt(checkHTTPReadLimitAttr)
writeString(checkHTTPURLAttr)
writeString(checkHTTPVersionAttr)
s := b.String()
return hashcode.String(s)
}
func checkConfigToAPIHTTP(c *circonusCheck, l interfaceList) error {
c.Type = string(apiCheckTypeHTTP)
// Iterate over all `http` attributes, even though we have a max of 1 in the
// schema.
for _, mapRaw := range l {
httpConfig := newInterfaceMap(mapRaw)
if v, found := httpConfig[checkHTTPAuthMethodAttr]; found {
c.Config[config.AuthMethod] = v.(string)
}
if v, found := httpConfig[checkHTTPAuthPasswordAttr]; found {
c.Config[config.AuthPassword] = v.(string)
}
if v, found := httpConfig[checkHTTPAuthUserAttr]; found {
c.Config[config.AuthUser] = v.(string)
}
if v, found := httpConfig[checkHTTPBodyRegexpAttr]; found {
c.Config[config.Body] = v.(string)
}
if v, found := httpConfig[checkHTTPCAChainAttr]; found {
c.Config[config.CAChain] = v.(string)
}
if v, found := httpConfig[checkHTTPCertFileAttr]; found {
c.Config[config.CertFile] = v.(string)
}
if v, found := httpConfig[checkHTTPCiphersAttr]; found {
c.Config[config.Ciphers] = v.(string)
}
if v, found := httpConfig[checkHTTPCodeRegexpAttr]; found {
c.Config[config.Code] = v.(string)
}
if v, found := httpConfig[checkHTTPExtractAttr]; found {
c.Config[config.Extract] = v.(string)
}
if headers := httpConfig.CollectMap(checkHTTPHeadersAttr); headers != nil {
for k, v := range headers {
h := config.HeaderPrefix + config.Key(k)
c.Config[h] = v
}
}
if v, found := httpConfig[checkHTTPKeyFileAttr]; found {
c.Config[config.KeyFile] = v.(string)
}
if v, found := httpConfig[checkHTTPMethodAttr]; found {
c.Config[config.Method] = v.(string)
}
if v, found := httpConfig[checkHTTPPayloadAttr]; found {
c.Config[config.Payload] = v.(string)
}
if v, found := httpConfig[checkHTTPReadLimitAttr]; found {
c.Config[config.ReadLimit] = fmt.Sprintf("%d", v.(int))
}
if v, found := httpConfig[checkHTTPURLAttr]; found {
c.Config[config.URL] = v.(string)
u, _ := url.Parse(v.(string))
hostInfo := strings.SplitN(u.Host, ":", 2)
if len(c.Target) == 0 {
c.Target = hostInfo[0]
}
if len(hostInfo) > 1 && c.Config[config.Port] == "" {
c.Config[config.Port] = hostInfo[1]
}
}
if v, found := httpConfig[checkHTTPVersionAttr]; found {
c.Config[config.HTTPVersion] = v.(string)
}
}
return nil
}