如何使用ibrowse将附件上传到CouchDB中的文档？

问题描述

我已经使用curl上传图片文件 Penguins.jpg 。例如：
C：\curl> curl -vX PUT -HContent-Type：image / jpeg --data-binary @ Penguins.jpg

I have used curl to upload an image file Penguins.jpg. For example: C:\curl>curl -vX PUT -H "Content-Type: image/jpeg" http://localhost:5984/DBNAME/DOCID/Penguins?rev=LATEST_REVISION --data-binary @Penguins.jpg

它的工作...

那么，如何使用ibrowse实现同样的功能？ =============================

So, how can I achieve the same using ibrowse? ===============================

推荐答案

自然地，文件上传是一个 HTTP POST 。现在让我们先写一下Erlang代码，这个代码是 。

Naturally, a file upload is an HTTP POST . Now lets first write piece of Erlang code which does HTTP/1.1 POST with Ibrowse .

%% Assumes Ibrowse application is in Code path
ensure_ibrowse()->
    case whereis(ibrowse) of
        undefined -> ibrowse:start();
        _ -> ok
    end.

post(Link,Data,Headers)-> 
    ensure_ibrowse(),
    try ibrowse:send_req(Link,Headers,post,Data) of 
        { _, _, _,Result} -> 
            io:format("\n\tFile Uploaded. Return: ~p~n",[Result]);
        EE -> {error,EE}
    catch
        XX:XX2 -> {error,XX,XX2}
    end.

从那里，让我们的Couch DB的东西。

From there, lets do our Couch DB thing.

-define(Link,"http://localhost:5984/DBNAME/DOCID/Penguins?rev=LATEST_REVISION").

%% File_path must be a valid file !
upload_file(Full_file_path)->
    case file:read_file(Full_file_path) of
        {ok,Binary} ->
            post(?Link,Binary,[{"Content-Type","image/jpeg"}]);
        Error -> Error
    end.

你去！所有您需要做的是自定义您的宏链接以适应您的沙发数据库设置，你很好去！

There you go ! All you need to do is to customize your Macro Link to fit your couch DB settings and you're good to go !

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