1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Threading.Tasks;
using HtmlAgilityPack;
using Pathoschild.FluentNexus.Models;
using Pathoschild.Http.Client;
using StardewModdingAPI.Toolkit;
using StardewModdingAPI.Toolkit.Framework.UpdateData;
using StardewModdingAPI.Web.Framework.Clients.Nexus.ResponseModels;
using FluentNexusClient = Pathoschild.FluentNexus.NexusClient;
namespace StardewModdingAPI.Web.Framework.Clients.Nexus
{
/// <summary>An HTTP client for fetching mod metadata from the Nexus website.</summary>
internal class NexusClient : INexusClient
{
/*********
** Fields
*********/
/// <summary>The URL for a Nexus mod page for the user, excluding the base URL, where {0} is the mod ID.</summary>
private readonly string WebModUrlFormat;
/// <summary>The URL for a Nexus mod page to scrape for versions, excluding the base URL, where {0} is the mod ID.</summary>
public string WebModScrapeUrlFormat { get; set; }
/// <summary>The underlying HTTP client for the Nexus Mods website.</summary>
private readonly IClient WebClient;
/// <summary>The underlying HTTP client for the Nexus API.</summary>
private readonly FluentNexusClient ApiClient;
/*********
** Accessors
*********/
/// <summary>The unique key for the mod site.</summary>
public ModSiteKey SiteKey => ModSiteKey.Nexus;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="webUserAgent">The user agent for the Nexus Mods web client.</param>
/// <param name="webBaseUrl">The base URL for the Nexus Mods site.</param>
/// <param name="webModUrlFormat">The URL for a Nexus Mods mod page for the user, excluding the <paramref name="webBaseUrl"/>, where {0} is the mod ID.</param>
/// <param name="webModScrapeUrlFormat">The URL for a Nexus mod page to scrape for versions, excluding the base URL, where {0} is the mod ID.</param>
/// <param name="apiAppVersion">The app version to show in API user agents.</param>
/// <param name="apiKey">The Nexus API authentication key.</param>
public NexusClient(string webUserAgent, string webBaseUrl, string webModUrlFormat, string webModScrapeUrlFormat, string apiAppVersion, string apiKey)
{
this.WebModUrlFormat = webModUrlFormat;
this.WebModScrapeUrlFormat = webModScrapeUrlFormat;
this.WebClient = new FluentClient(webBaseUrl).SetUserAgent(webUserAgent);
this.ApiClient = new FluentNexusClient(apiKey, "SMAPI", apiAppVersion);
}
/// <summary>Get update check info about a mod.</summary>
/// <param name="id">The mod ID.</param>
public async Task<IModPage> GetModData(string id)
{
IModPage page = new GenericModPage(this.SiteKey, id);
if (!uint.TryParse(id, out uint parsedId))
return page.SetError(RemoteModStatus.DoesNotExist, $"The value '{id}' isn't a valid Nexus mod ID, must be an integer ID.");
// Fetch from the Nexus website when possible, since it has no rate limits. Mods with
// adult content are hidden for anonymous users, so fall back to the API in that case.
// Note that the API has very restrictive rate limits which means we can't just use it
// for all cases.
NexusMod mod = await this.GetModFromWebsiteAsync(parsedId);
if (mod?.Status == NexusModStatus.AdultContentForbidden)
mod = await this.GetModFromApiAsync(parsedId);
// page doesn't exist
if (mod == null || mod.Status is NexusModStatus.Hidden or NexusModStatus.NotPublished)
return page.SetError(RemoteModStatus.DoesNotExist, "Found no Nexus mod with this ID.");
// return info
page.SetInfo(name: mod.Name, url: mod.Url, version: mod.Version, downloads: mod.Downloads);
if (mod.Status != NexusModStatus.Ok)
page.SetError(RemoteModStatus.TemporaryError, mod.Error);
return page;
}
/// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
public void Dispose()
{
this.WebClient?.Dispose();
}
/*********
** Private methods
*********/
/// <summary>Get metadata about a mod by scraping the Nexus website.</summary>
/// <param name="id">The Nexus mod ID.</param>
/// <returns>Returns the mod info if found, else <c>null</c>.</returns>
private async Task<NexusMod> GetModFromWebsiteAsync(uint id)
{
// fetch HTML
string html;
try
{
html = await this.WebClient
.GetAsync(string.Format(this.WebModScrapeUrlFormat, id))
.AsString();
}
catch (ApiException ex) when (ex.Status == HttpStatusCode.NotFound)
{
return null;
}
// parse HTML
var doc = new HtmlDocument();
doc.LoadHtml(html);
// handle Nexus error message
HtmlNode node = doc.DocumentNode.SelectSingleNode("//div[contains(@class, 'site-notice')][contains(@class, 'warning')]");
if (node != null)
{
string[] errorParts = node.InnerText.Trim().Split(new[] { '\n' }, 2, System.StringSplitOptions.RemoveEmptyEntries);
string errorCode = errorParts[0];
string errorText = errorParts.Length > 1 ? errorParts[1] : null;
switch (errorCode.Trim().ToLower())
{
case "not found":
return null;
default:
return new NexusMod { Error = $"Nexus error: {errorCode} ({errorText}).", Status = this.GetWebStatus(errorCode) };
}
}
// extract mod info
string url = this.GetModUrl(id);
string name = doc.DocumentNode.SelectSingleNode("//div[@id='pagetitle']//h1")?.InnerText.Trim();
string version = doc.DocumentNode.SelectSingleNode("//ul[contains(@class, 'stats')]//li[@class='stat-version']//div[@class='stat']")?.InnerText.Trim();
SemanticVersion.TryParse(version, out ISemanticVersion parsedVersion);
// extract files
var downloads = new List<IModDownload>();
foreach (var fileSection in doc.DocumentNode.SelectNodes("//div[contains(@class, 'files-tabs')]"))
{
string sectionName = fileSection.Descendants("h2").First().InnerText;
if (sectionName != "Main files" && sectionName != "Optional files")
continue;
foreach (var container in fileSection.Descendants("dt"))
{
string fileName = container.GetDataAttribute("name").Value;
string fileVersion = container.GetDataAttribute("version").Value;
string description = container.SelectSingleNode("following-sibling::*[1][self::dd]//div").InnerText?.Trim(); // get text of next <dd> tag; derived from https://stackoverflow.com/a/25535623/262123
downloads.Add(
new GenericModDownload(fileName, description, fileVersion)
);
}
}
// yield info
return new NexusMod
{
Name = name,
Version = parsedVersion?.ToString() ?? version,
Url = url,
Downloads = downloads.ToArray()
};
}
/// <summary>Get metadata about a mod from the Nexus API.</summary>
/// <param name="id">The Nexus mod ID.</param>
/// <returns>Returns the mod info if found, else <c>null</c>.</returns>
private async Task<NexusMod> GetModFromApiAsync(uint id)
{
// fetch mod
Mod mod = await this.ApiClient.Mods.GetMod("stardewvalley", (int)id);
ModFileList files = await this.ApiClient.ModFiles.GetModFiles("stardewvalley", (int)id, FileCategory.Main, FileCategory.Optional);
// yield info
return new NexusMod
{
Name = mod.Name,
Version = SemanticVersion.TryParse(mod.Version, out ISemanticVersion version) ? version?.ToString() : mod.Version,
Url = this.GetModUrl(id),
Downloads = files.Files
.Select(file => (IModDownload)new GenericModDownload(file.Name, file.Description, file.FileVersion))
.ToArray()
};
}
/// <summary>Get the full mod page URL for a given ID.</summary>
/// <param name="id">The mod ID.</param>
private string GetModUrl(uint id)
{
UriBuilder builder = new(this.WebClient.BaseClient.BaseAddress);
builder.Path += string.Format(this.WebModUrlFormat, id);
return builder.Uri.ToString();
}
/// <summary>Get the mod status for a web error code.</summary>
/// <param name="errorCode">The Nexus error code.</param>
private NexusModStatus GetWebStatus(string errorCode)
{
switch (errorCode.Trim().ToLower())
{
case "adult content":
return NexusModStatus.AdultContentForbidden;
case "hidden mod":
return NexusModStatus.Hidden;
case "not published":
return NexusModStatus.NotPublished;
default:
return NexusModStatus.Other;
}
}
}
}
|
