3 A feature represents a location. It has index _fid_. It has two dimensions:
4 _lagitude_ and _longitude_. It may have an image represented by it's url.
5 This field is called _imgurl_; it may also have a _title_ and/or a _description_.
7 # client to server communication:
9 Client submits a classic html form to server.
11 **note**: In this documentation, php notation is used (`_POST` and `_FILES`),
12 but server may be written in any language.
14 ` _POST["password"]` and `_POST["user"] may contain user name and password. If
15 they are set, access is checked. If they is not set, cookies are checked. If
18 `_POST["request"]` is either:
21 asks for authentication
25 * `$_POST ["newuser_name"]` must contain user name
26 * `$_POST ["newuser_password"]` must contain user password
28 Only admin can add new users.
34 * `_POST["lon"]` must contain feature longitude
35 * `_POST["lat"]` must contain feature latitude
36 * `_POST["title"]` may contain feature title
37 * `_POST["description"]` may contain feature description
38 * `_FILES["image_file"]` may contain an uploaded image
41 to delete an existing feature
43 * `_POST["fid"]` must contain feature id
46 to modify an existing feature
48 * `_POST["fid"]` must contain feature id
49 * `_POST["lon"]` must contain feature longitude
50 * `_POST["lat"]` must contain feature latitude
51 * `_POST["title"]` may contain feature title
52 * `_POST["description"]` may contain feature description
54 if `_POST["keep_img"]` is "yes", feature image will not be modified.
55 Otherwise, `_FILES["photo_file"]` is checked for an uploaded file. If
56 `_FILES["photo_file"]` is empty, existing feature image will be deleted.
57 Otherwise, uploaded file will replace current feature image.
59 # server reply to client:
60 Server replies with xml content. In an ideal world, reply would be just xml
61 content. But due to technical issues, syp must wrap xml content in the body of a
62 html document. So for example, instead of sending
64 `<error reason="unauthorized"></error>`
66 as _text/xml_, syp sends
68 `<html><head></head><body><error reason="unauthorized"></error></body></html>`
74 reply is something like `<error reason="?reason?"></error>` with _?reason?_ can be either:
76 * `unauthorized`: user is not authorized to execute request, or authentication failed
77 * `server`: an error occured on server side (such as database problem)
78 * `request`: server could not understand request
79 * `toobig`: uploaded file was too big
80 * `notation`: uploaded file was not an image
81 * `nochange`: when trying to update a feature, there is nothing to update (ie: no field of the feature has changed)
82 * `newuser_exists`: when trying to add an user which has the same name as an already registered user
86 * `<success request="auth"><user>?user_name?</name></success>`:
87 authentication was successfull. ?user_name? is name of authenticated user.
89 * `<success request="newuser"><user>?user_name?</name></success>`:
90 new user addition was successfull. ?user_name? is name of newly added user.
92 * `<success request="del">
97 deletion was successfull. _?id?_ was property of deleted feature
99 * `<success request="add">
102 <imgurl>?imgurl?</imgurl>
103 <description>?description?</description>
104 <heading>?heading?</heading>
109 addition was successfull. _?id?_, _?imgurl?_, _?description?_,
110 _?heading?_, _?lon?_, _?lat?_ are properties of added feature;
112 * `<success request="update">
115 <imgurl>?imgurl?</imgurl>
116 <description>?description?</description>
117 <heading>?heading?</heading>
122 update was successfull. _?id?_, _?imgurl?_, _?description?_, _?heading?_,
123 _?lon?_, _?lat?_ are properties of updated feature;