fix: chart tool can't display chinese

api/Dockerfile

@@ -56,6 +56,8 @@ RUN apt-get update \
     && apt-get update \
     # For Security
     && apt-get install -y --no-install-recommends zlib1g=1:1.3.dfsg+really1.3.1-1 expat=2.6.3-1 libldap-2.5-0=2.5.18+dfsg-3 perl=5.38.2-5 libsqlite3-0=3.46.1-1 \
+    # install a chinese font to support the use of tools like matplotlib
+    && apt-get install -y fonts-noto-cjk \
     && apt-get autoremove -y \
     && rm -rf /var/lib/apt/lists/*
 

api/core/tools/provider/builtin/chart/chart.py

@@ -1,77 +1,36 @@
 import matplotlib.pyplot as plt
-from fontTools.ttLib import TTFont
-from matplotlib.font_manager import findSystemFonts
+from matplotlib.font_manager import FontProperties
 
-from core.tools.errors import ToolProviderCredentialValidationError
-from core.tools.provider.builtin.chart.tools.line import LinearChartTool
 from core.tools.provider.builtin_tool_provider import BuiltinToolProviderController
 
-# use a business theme
-plt.style.use("seaborn-v0_8-darkgrid")
-plt.rcParams["axes.unicode_minus"] = False
-
-
-def init_fonts():
-    fonts = findSystemFonts()
 
-    popular_unicode_fonts = [
+def set_chinese_font():
+    font_list = [
+        "PingFang SC",
+        "SimHei",
+        "Microsoft YaHei",
+        "STSong",
+        "SimSun",
         "Arial Unicode MS",
-        "DejaVu Sans",
-        "DejaVu Sans Mono",
-        "DejaVu Serif",
-        "FreeMono",
-        "FreeSans",
-        "FreeSerif",
-        "Liberation Mono",
-        "Liberation Sans",
-        "Liberation Serif",
-        "Noto Mono",
-        "Noto Sans",
-        "Noto Serif",
-        "Open Sans",
-        "Roboto",
-        "Source Code Pro",
-        "Source Sans Pro",
-        "Source Serif Pro",
-        "Ubuntu",
-        "Ubuntu Mono",
+        "Noto Sans CJK SC",
+        "Noto Sans CJK JP",
     ]
 
-    supported_fonts = []
+    for font in font_list:
+        chinese_font = FontProperties(font)
+        if chinese_font.get_name() == font:
+            return chinese_font
 
-    for font_path in fonts:
-        try:
-            font = TTFont(font_path)
-            # get family name
-            family_name = font["name"].getName(1, 3, 1).toUnicode()
-            if family_name in popular_unicode_fonts:
-                supported_fonts.append(family_name)
-        except:
-            pass
+    return FontProperties()
 
-    plt.rcParams["font.family"] = "sans-serif"
-    # sort by order of popular_unicode_fonts
-    for font in popular_unicode_fonts:
-        if font in supported_fonts:
-            plt.rcParams["font.sans-serif"] = font
-            break
 
-
-init_fonts()
+# use a business theme
+plt.style.use("seaborn-v0_8-darkgrid")
+plt.rcParams["axes.unicode_minus"] = False
+font_properties = set_chinese_font()
+plt.rcParams["font.family"] = font_properties.get_name()
 
 
 class ChartProvider(BuiltinToolProviderController):
     def _validate_credentials(self, credentials: dict) -> None:
-        try:
-            LinearChartTool().fork_tool_runtime(
-                runtime={
-                    "credentials": credentials,
-                }
-            ).invoke(
-                user_id="",
-                tool_parameters={
-                    "data": "1,3,5,7,9,2,4,6,8,10",
-                },
-            )
-        except Exception as e:
-            raise ToolProviderCredentialValidationError(str(e))
+        pass