我一直在尝试在 Compojure 中制作一个基本的 Web 应用程序,托管在 Heroku 上。我一直在关注这个网站上的教程:
http://www.vijaykiran.com/2012/01/17/web-application-development-with-clojure-part-2/
并且已经在 Lobos 和 Korma 部分研磨了大约 2 天。我的应用程序现在可以连接到我的本地 Postgres 服务器,但是当我尝试推送到 Heroku 或连接到我的 Heroku Postgres 数据库时,我收到以下错误:
PSQLException FATAL: no pg_hba.conf entry for host "the IP", user "the username", database "the dbname", SSL off org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication (ConnectionFactoryImpl.java:291)
这是我的project.clj:
(defproject portfolio "1.0.0-SNAPSHOT"
:description "My personal portfolio"
:url "the URL"
:license {:name "FIXME: choose"
:url "http://example.com/FIXME"}
:dependencies [[compojure "1.1.1"]
[ring/ring-jetty-adapter "1.1.0"]
[ring/ring-devel "1.1.0"]
[ring-basic-authentication "1.0.1"]
[environ "0.4.0"]
[com.cemerick/drawbridge "0.0.6"]
[hiccup "1.0.4"]
[lobos "1.0.0-beta1"]
[korma "0.3.0-RC5"]
[org.clojure/java.jdbc "0.2.3"]
[postgresql "9.1-901.jdbc4"]
[clj-yaml "0.3.1"]
[http.async.client "0.5.2"]
[clj-bonecp-url "0.1.0"]
[org.slf4j/slf4j-nop "1.7.2"]
[org.clojure/clojure "1.5.1"]]
:min-lein-version "2.0.0"
:plugins [[environ/environ.lein "0.2.1"]]
:hooks [environ.leiningen.hooks]
:profiles {:production {:env {:production true}}})
我正在使用 lobos ( https://github.com/budu/lobos ) 进行数据迁移。我按照 github 页面的建议制作了一个 config.clj,并根据此页面的建议对其进行了编辑。
(ns lobos.config
(:refer-clojure :exclude [replace reverse])
(:use [clojure.string :as str]
lobos.connectivity)
(:import (java.net URI)))
(defn heroku-db
"Generate the db map according to Heroku environment when available."
[]
(when (System/getenv "DATABASE_URL")
(let [url (URI. (System/getenv "DATABASE_URL"))
host (.getHost url)
port (if (pos? (.getPort url)) (.getPort url) 5432)
path (.getPath url)]
(merge
{:subname (str "//" host ":" port path)}
(when-let [user-info (.getUserInfo url)]
{:user (first (str/split user-info #":"))
:password (second (str/split user-info #":"))})))))
(def db
(merge {:classname "org.postgresql.Driver"
:subprotocol "postgresql"
:subname "//localhost:5432/blogdb"}
(heroku-db)))
(defn open-global-when-necessary
"Open a global connection only when necessary, that is, when no previous
connection exist or when db-spec is different to the current global
connection."
[db-spec]
;; If the connection credentials has changed, close the connection.
(when (and (@lobos.connectivity/global-connections :default-connection)
(not= (:db-spec (@lobos.connectivity/global-connections :default-connection)) db-spec))
(lobos.connectivity/close-global))
;; Open a new connection or return the existing one.
(if (nil? (@lobos.connectivity/global-connections :default-connection))
((lobos.connectivity/open-global db-spec) :default-connection)
(@lobos.connectivity/global-connections :default-connection)))
(open-global-when-necessary db)
这给了我上面提到的错误。
我设法弄清楚如何启用 SSL,但添加:ssl "true"
到 config.clj 中的数据库映射。但是,现在我有一个新错误:
SunCertPathBuilderException unable to find valid certification path to requested target.
当我尝试推送到 heroku 时,无论 SSL 是打开还是关闭,都会出现以下错误:
Exception in thread "main" org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections., compiling:(config.clj:44:1)
如果您需要更多细节,请告诉我。